312203031131 has 4 divisors (see below), whose sum is σ = 312216287592. Its totient is φ = 312189774672.

The previous prime is 312203031103. The next prime is 312203031163. The reversal of 312203031131 is 131130302213.

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 312203031131 - 2¹⁸ = 312202768987 is a prime.

It is a super-2 number, since 2×312203031131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312203037131) 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, 6592841 + ... + 6640026.

It is an arithmetic number, because the mean of its divisors is an integer number (78054071898).

Almost surely, 2^312203031131 is an apocalyptic number.

312203031131 is a deficient number, since it is larger than the sum of its proper divisors (13256461).

312203031131 is a wasteful number, since it uses less digits than its factorization.

312203031131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13256460.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 312203031131 its reverse (131130302213), we get a palindrome (443333333344).

The spelling of 312203031131 in words is "three hundred twelve billion, two hundred three million, thirty-one thousand, one hundred thirty-one".