312513136 has 20 divisors (see below), whose sum is σ = 652071112. Its totient is φ = 144236736.

The previous prime is 312513133. The next prime is 312513163. The reversal of 312513136 is 631315213.

312513136 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 312513136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312513133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 751026 + ... + 751441.

Almost surely, 2^312513136 is an apocalyptic number.

It is an amenable number.

312513136 is an abundant number, since it is smaller than the sum of its proper divisors (339557976).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312513136 is a wasteful number, since it uses less digits than its factorization.

312513136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502488 (or 1502482 counting only the distinct ones).

The product of its digits is 1620, while the sum is 25.

The square root of 312513136 is about 17678.0410679464. The cubic root of 312513136 is about 678.6139124395.

Adding to 312513136 its reverse (631315213), we get a palindrome (943828349).

It can be divided in two parts, 3125 and 13136, that added together give a palindrome (16261).

The spelling of 312513136 in words is "three hundred twelve million, five hundred thirteen thousand, one hundred thirty-six".