312331013 has 4 divisors (see below), whose sum is σ = 312371328. Its totient is φ = 312290700.

The previous prime is 312331009. The next prime is 312331037. The reversal of 312331013 is 310133213.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 312331013 - 2² = 312331009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312330982 and 312331000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312331043) 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, 4463 + ... + 25388.

It is an arithmetic number, because the mean of its divisors is an integer number (78092832).

Almost surely, 2^312331013 is an apocalyptic number.

It is an amenable number.

312331013 is a deficient number, since it is larger than the sum of its proper divisors (40315).

312331013 is a wasteful number, since it uses less digits than its factorization.

312331013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40314.

The product of its (nonzero) digits is 162, while the sum is 17.

The square root of 312331013 is about 17672.8892091814. The cubic root of 312331013 is about 678.4820617496.

Adding to 312331013 its reverse (310133213), we get a palindrome (622464226).

The spelling of 312331013 in words is "three hundred twelve million, three hundred thirty-one thousand, thirteen".