312135656 has 32 divisors (see below), whose sum is σ = 681488640. Its totient is φ = 131247168.

The previous prime is 312135653. The next prime is 312135697. The reversal of 312135656 is 656531213.

312135656 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (312135653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49616 + ... + 55551.

It is an arithmetic number, because the mean of its divisors is an integer number (21296520).

Almost surely, 2^312135656 is an apocalyptic number.

It is an amenable number.

312135656 is an abundant number, since it is smaller than the sum of its proper divisors (369352984).

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

312135656 is a wasteful number, since it uses less digits than its factorization.

312135656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105233 (or 105229 counting only the distinct ones).

The product of its digits is 16200, while the sum is 32.

The square root of 312135656 is about 17667.3613196765. The cubic root of 312135656 is about 678.3405731160.

Adding to 312135656 its reverse (656531213), we get a palindrome (968666869).

The spelling of 312135656 in words is "three hundred twelve million, one hundred thirty-five thousand, six hundred fifty-six".