312012331 has 4 divisors (see below), whose sum is σ = 315101664. Its totient is φ = 308923000.

The previous prime is 312012329. The next prime is 312012341. The reversal of 312012331 is 133210213.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 133210213 = 101 ⋅1318913.

It is a cyclic number.

It is not a de Polignac number, because 312012331 - 2¹ = 312012329 is a prime.

It is a super-2 number, since 2×312012331² = 194703389392107122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312012301) 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, 1544515 + ... + 1544716.

It is an arithmetic number, because the mean of its divisors is an integer number (78775416).

Almost surely, 2^312012331 is an apocalyptic number.

312012331 is a deficient number, since it is larger than the sum of its proper divisors (3089333).

312012331 is a wasteful number, since it uses less digits than its factorization.

312012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3089332.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 312012331 is about 17663.8707819096. The cubic root of 312012331 is about 678.2512237476.

Adding to 312012331 its reverse (133210213), we get a palindrome (445222544).

It can be divided in two parts, 3120 and 12331, that added together give a palindrome (15451).

The spelling of 312012331 in words is "three hundred twelve million, twelve thousand, three hundred thirty-one".