31513100313 has 32 divisors (see below), whose sum is σ = 45824819200. Its totient is φ = 19189612800.

The previous prime is 31513100309. The next prime is 31513100317. The reversal of 31513100313 is 31300131513.

It is an interprime number because it is at equal distance from previous prime (31513100309) and next prime (31513100317).

It is not a de Polignac number, because 31513100313 - 2² = 31513100309 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31513100313.

It is not an unprimeable number, because it can be changed into a prime (31513100317) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 445953 + ... + 511761.

It is an arithmetic number, because the mean of its divisors is an integer number (1432025600).

Almost surely, 2^31513100313 is an apocalyptic number.

It is an amenable number.

31513100313 is a deficient number, since it is larger than the sum of its proper divisors (14311718887).

31513100313 is a wasteful number, since it uses less digits than its factorization.

31513100313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66133.

The product of its (nonzero) digits is 405, while the sum is 21.

Adding to 31513100313 its reverse (31300131513), we get a palindrome (62813231826).

The spelling of 31513100313 in words is "thirty-one billion, five hundred thirteen million, one hundred thousand, three hundred thirteen".