312135131 has 16 divisors (see below), whose sum is σ = 397440000. Its totient is φ = 238044480.

The previous prime is 312135121. The next prime is 312135143. The reversal of 312135131 is 131531213.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312135131 is a prime.

It is a super-2 number, since 2×312135131² = 194856680008774322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312135121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39506 + ... + 46743.

It is an arithmetic number, because the mean of its divisors is an integer number (24840000).

Almost surely, 2^312135131 is an apocalyptic number.

312135131 is a deficient number, since it is larger than the sum of its proper divisors (85304869).

312135131 is a wasteful number, since it uses less digits than its factorization.

312135131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86314.

The product of its digits is 270, while the sum is 20.

The square root of 312135131 is about 17667.3464617639. The cubic root of 312135131 is about 678.3401928016.

Adding to 312135131 its reverse (131531213), we get a palindrome (443666344).

The spelling of 312135131 in words is "three hundred twelve million, one hundred thirty-five thousand, one hundred thirty-one".