3131213031 has 40 divisors (see below), whose sum is σ = 4898931840. Its totient is φ = 1989325008.

The previous prime is 3131213003. The next prime is 3131213047. The reversal of 3131213031 is 1303121313.

It is a happy number.

3131213031 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 3131213031 - 2⁶ = 3131212967 is a prime.

It is a super-2 number, since 2×3131213031² = 19608990091008413922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3131212995 and 3131213013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131213831) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 524260 + ... + 530198.

It is an arithmetic number, because the mean of its divisors is an integer number (122473296).

Almost surely, 2^3131213031 is an apocalyptic number.

3131213031 is a deficient number, since it is larger than the sum of its proper divisors (1767718809).

3131213031 is a wasteful number, since it uses less digits than its factorization.

3131213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6257 (or 6248 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

The square root of 3131213031 is about 55957.2428824008. The cubic root of 3131213031 is about 1462.9771350494.

Adding to 3131213031 its reverse (1303121313), we get a palindrome (4434334344).

The spelling of 3131213031 in words is "three billion, one hundred thirty-one million, two hundred thirteen thousand, thirty-one".