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113113613161 = 31671632291459
BaseRepresentation
bin110100101011000011…
…0001100001101101001
3101210222002012220200001
41221112012030031221
53323124041110121
6123544053143001
711113026563563
oct1512606141551
9353862186601
10113113613161
1143a7575a82a
1219b0962aa61
13a8885b0263
145690922333
152e2062e991
hex1a5618c369

113113613161 has 32 divisors (see below), whose sum is σ = 119834931200. Its totient is φ = 106628322240.

The previous prime is 113113613153. The next prime is 113113613189. The reversal of 113113613161 is 161316311311.

113113613161 is a nontrivial binomial coefficient, being equal to C(475634, 2).

It is a cyclic number.

It is not a de Polignac number, because 113113613161 - 23 = 113113613153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113113613191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77527450 + ... + 77528908.

It is an arithmetic number, because the mean of its divisors is an integer number (3744841600).

Almost surely, 2113113613161 is an apocalyptic number.

113113613161 is the 475633-rd triangular number and also the 237817-th hexagonal number.

113113613161 is the 158545-th centered nonagonal number.

It is an amenable number.

113113613161 is a deficient number, since it is larger than the sum of its proper divisors (6721318039).

113113613161 is a wasteful number, since it uses less digits than its factorization.

113113613161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949.

The product of its digits is 972, while the sum is 28.

Adding to 113113613161 its reverse (161316311311), we get a palindrome (274429924472).

The spelling of 113113613161 in words is "one hundred thirteen billion, one hundred thirteen million, six hundred thirteen thousand, one hundred sixty-one".

Divisors: 1 31 67 163 229 1459 2077 5053 7099 10921 15343 37327 45229 97753 237817 334111 338551 475633 1157137 2500909 3030343 7372327 10357441 15933739 22385437 54460093 77528179 493945909 693948547 1688262883 3648826231 113113613161