312040131 has 8 divisors (see below), whose sum is σ = 448057680. Its totient is φ = 192024672.

The previous prime is 312040123. The next prime is 312040133. The reversal of 312040131 is 131040213.

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

It is not a de Polignac number, because 312040131 - 2³ = 312040123 is a prime.

It is a super-2 number, since 2×312040131² = 194738086708994322, 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 312040131.

It is not an unprimeable number, because it can be changed into a prime (312040133) 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, 4000476 + ... + 4000553.

It is an arithmetic number, because the mean of its divisors is an integer number (56007210).

Almost surely, 2^312040131 is an apocalyptic number.

312040131 is a deficient number, since it is larger than the sum of its proper divisors (136017549).

312040131 is a wasteful number, since it uses less digits than its factorization.

312040131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8001045.

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

The square root of 312040131 is about 17664.6576813704. The cubic root of 312040131 is about 678.2713669943.

Adding to 312040131 its reverse (131040213), we get a palindrome (443080344).

The spelling of 312040131 in words is "three hundred twelve million, forty thousand, one hundred thirty-one".