312342531 has 4 divisors (see below), whose sum is σ = 416456712. Its totient is φ = 208228352.

The previous prime is 312342521. The next prime is 312342533. The reversal of 312342531 is 135243213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312342531 - 2¹³ = 312334339 is a prime.

It is a super-2 number, since 2×312342531² = 195115713342971922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312342533) 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, 52057086 + ... + 52057091.

It is an arithmetic number, because the mean of its divisors is an integer number (104114178).

Almost surely, 2^312342531 is an apocalyptic number.

312342531 is a deficient number, since it is larger than the sum of its proper divisors (104114181).

312342531 is a wasteful number, since it uses less digits than its factorization.

312342531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104114180.

The product of its digits is 2160, while the sum is 24.

The square root of 312342531 is about 17673.2150725328. The cubic root of 312342531 is about 678.4904018973.

Adding to 312342531 its reverse (135243213), we get a palindrome (447585744).

It can be divided in two parts, 3123 and 42531, that added together give a palindrome (45654).

The spelling of 312342531 in words is "three hundred twelve million, three hundred forty-two thousand, five hundred thirty-one".