3131215131 has 24 divisors (see below), whose sum is σ = 4596499152. Its totient is φ = 1894604800.

The previous prime is 3131215127. The next prime is 3131215163. The reversal of 3131215131 is 1315121313.

3131215131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3131215131 - 2² = 3131215127 is a prime.

It is a super-2 number, since 2×3131215131² = 19609016393206694322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3131215098 and 3131215107.

It is not an unprimeable number, because it can be changed into a prime (3131215531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 225955 + ... + 239411.

It is an arithmetic number, because the mean of its divisors is an integer number (191520798).

Almost surely, 2^3131215131 is an apocalyptic number.

3131215131 is a deficient number, since it is larger than the sum of its proper divisors (1465284021).

3131215131 is a wasteful number, since it uses less digits than its factorization.

3131215131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14123 (or 14112 counting only the distinct ones).

The product of its digits is 270, while the sum is 21.

The square root of 3131215131 is about 55957.2616467246. The cubic root of 3131215131 is about 1462.9774621059.

Adding to 3131215131 its reverse (1315121313), we get a palindrome (4446336444).

The spelling of 3131215131 in words is "three billion, one hundred thirty-one million, two hundred fifteen thousand, one hundred thirty-one".