312515515213 has 12 divisors (see below), whose sum is σ = 343608330240. Its totient is φ = 284022687080.

The previous prime is 312515515177. The next prime is 312515515253.

It is a happy number.

312515515213 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 312515515213 - 2¹³ = 312515507021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312515515253) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47028 + ... + 791986.

It is an arithmetic number, because the mean of its divisors is an integer number (28634027520).

Almost surely, 2^312515515213 is an apocalyptic number.

It is an amenable number.

312515515213 is a deficient number, since it is larger than the sum of its proper divisors (31092815027).

312515515213 is a wasteful number, since it uses less digits than its factorization.

312515515213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748448 (or 748437 counting only the distinct ones).

The product of its digits is 22500, while the sum is 34.

It can be divided in two parts, 312515 and 515213, that added together give a palindrome (827728).

The spelling of 312515515213 in words is "three hundred twelve billion, five hundred fifteen million, five hundred fifteen thousand, two hundred thirteen".