3111664731 has 16 divisors (see below), whose sum is σ = 4747106304. Its totient is φ = 1776023424.

The previous prime is 3111664729. The next prime is 3111664781. The reversal of 3111664731 is 1374661113.

It is not a de Polignac number, because 3111664731 - 2¹ = 3111664729 is a prime.

It is a super-2 number, since 2×3111664731² = 19364914796298604722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3111664692 and 3111664701.

It is not an unprimeable number, because it can be changed into a prime (3111664781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67726 + ... + 103971.

It is an arithmetic number, because the mean of its divisors is an integer number (296694144).

Almost surely, 2^3111664731 is an apocalyptic number.

3111664731 is a deficient number, since it is larger than the sum of its proper divisors (1635441573).

3111664731 is a wasteful number, since it uses less digits than its factorization.

3111664731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172570.

The product of its digits is 9072, while the sum is 33.

The square root of 3111664731 is about 55782.2976489854. The cubic root of 3111664731 is about 1459.9263006208.

The spelling of 3111664731 in words is "three billion, one hundred eleven million, six hundred sixty-four thousand, seven hundred thirty-one".