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311222113 = 2931346187
BaseRepresentation
bin10010100011001…
…101111101100001
3210200121201110221
4102203031331201
51114133101423
650514323041
710466226046
oct2243157541
9720551427
10311222113
1114a749864
1288289481
134c6299c7
142d4951cd
151c4c8e5d
hex128cdf61

311222113 has 8 divisors (see below), whose sum is σ = 332340480. Its totient is φ = 290796240.

The previous prime is 311222101. The next prime is 311222137.

311222113 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 311222113 - 25 = 311222081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311262113) 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, 172195 + ... + 173992.

It is an arithmetic number, because the mean of its divisors is an integer number (41542560).

Almost surely, 2311222113 is an apocalyptic number.

It is an amenable number.

311222113 is a deficient number, since it is larger than the sum of its proper divisors (21118367).

311222113 is a wasteful number, since it uses less digits than its factorization.

311222113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 346247.

The product of its digits is 72, while the sum is 16.

The square root of 311222113 is about 17641.4884009258. The cubic root of 311222113 is about 677.6781487100.

The spelling of 311222113 in words is "three hundred eleven million, two hundred twenty-two thousand, one hundred thirteen".

Divisors: 1 29 31 899 346187 10039423 10731797 311222113