312400131 has 8 divisors (see below), whose sum is σ = 421552320. Its totient is φ = 205757352.

The previous prime is 312400129. The next prime is 312400181. The reversal of 312400131 is 131004213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 312400131 - 2¹ = 312400129 is a prime.

It is a super-2 number, since 2×312400131² = 195187683697634322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 312400131.

It is not an unprimeable number, because it can be changed into a prime (312400181) 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, 627061 + ... + 627558.

It is an arithmetic number, because the mean of its divisors is an integer number (52694040).

Almost surely, 2^312400131 is an apocalyptic number.

312400131 is a deficient number, since it is larger than the sum of its proper divisors (109152189).

312400131 is a wasteful number, since it uses less digits than its factorization.

312400131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254705.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 312400131 is about 17674.8445820607. The cubic root of 312400131 is about 678.5321068004.

Adding to 312400131 its reverse (131004213), we get a palindrome (443404344).

The spelling of 312400131 in words is "three hundred twelve million, four hundred thousand, one hundred thirty-one".