3113921257 has 4 divisors (see below), whose sum is σ = 3146023636. Its totient is φ = 3081818880.

The previous prime is 3113921249. The next prime is 3113921281. The reversal of 3113921257 is 7521293113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7521293113 = 107 ⋅70292459.

It can be written as a sum of positive squares in 2 ways, for example, as 2361571216 + 752350041 = 48596^2 + 27429^2 .

It is a cyclic number.

It is not a de Polignac number, because 3113921257 - 2³ = 3113921249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3113921207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16051044 + ... + 16051237.

It is an arithmetic number, because the mean of its divisors is an integer number (786505909).

Almost surely, 2^3113921257 is an apocalyptic number.

It is an amenable number.

3113921257 is a deficient number, since it is larger than the sum of its proper divisors (32102379).

3113921257 is an equidigital number, since it uses as much as digits as its factorization.

3113921257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32102378.

The product of its digits is 11340, while the sum is 34.

The square root of 3113921257 is about 55802.5201671036. The cubic root of 3113921257 is about 1460.2791198695.

The spelling of 3113921257 in words is "three billion, one hundred thirteen million, nine hundred twenty-one thousand, two hundred fifty-seven".