3131021013 has 16 divisors (see below), whose sum is σ = 4213215360. Its totient is φ = 2068163136.

The previous prime is 3131020973. The next prime is 3131021017. The reversal of 3131021013 is 3101201313.

It is not a de Polignac number, because 3131021013 - 2¹⁰ = 3131019989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3131020983 and 3131021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3131021017) 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, 159831 + ... + 178347.

It is an arithmetic number, because the mean of its divisors is an integer number (263325960).

Almost surely, 2^3131021013 is an apocalyptic number.

It is an amenable number.

3131021013 is a deficient number, since it is larger than the sum of its proper divisors (1082194347).

3131021013 is a wasteful number, since it uses less digits than its factorization.

3131021013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19036.

The product of its (nonzero) digits is 54, while the sum is 15.

The square root of 3131021013 is about 55955.5270996530. The cubic root of 3131021013 is about 1462.9472293139.

Adding to 3131021013 its reverse (3101201313), we get a palindrome (6232222326).

The spelling of 3131021013 in words is "three billion, one hundred thirty-one million, twenty-one thousand, thirteen".