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2103131321 = 8939475987
BaseRepresentation
bin111110101011011…
…0011110010111001
312102120102010210122
41331112303302321
513301400200241
6544405223025
7103055215124
oct17526636271
95376363718
102103131321
1198a187765
124a8401a75
13276946205
1415d4633bb
15c498504b
hex7d5b3cb9

2103131321 has 8 divisors (see below), whose sum is σ = 2127656160. Its totient is φ = 2078626528.

The previous prime is 2103131297. The next prime is 2103131363. The reversal of 2103131321 is 1231313012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-2103131321 is a prime.

It is a super-2 number, since 2×21031313212 = 8846322706742410082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2103131321.

It is not an unprimeable number, because it can be changed into a prime (2103131521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348290 + ... + 354276.

It is an arithmetic number, because the mean of its divisors is an integer number (265957020).

Almost surely, 22103131321 is an apocalyptic number.

It is an amenable number.

2103131321 is a deficient number, since it is larger than the sum of its proper divisors (24524839).

2103131321 is an equidigital number, since it uses as much as digits as its factorization.

2103131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10023.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 2103131321 is about 45859.9097360647. The cubic root of 2103131321 is about 1281.2153416570.

Adding to 2103131321 its reverse (1231313012), we get a palindrome (3334444333).

The spelling of 2103131321 in words is "two billion, one hundred three million, one hundred thirty-one thousand, three hundred twenty-one".

Divisors: 1 89 3947 5987 351283 532843 23630689 2103131321