2312961531 has 4 divisors (see below), whose sum is σ = 3083948712. Its totient is φ = 1541974352.

The previous prime is 2312961527. The next prime is 2312961551. The reversal of 2312961531 is 1351692132.

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 2312961531 - 2² = 2312961527 is a prime.

It is a super-2 number, since 2×2312961531² = 10699582087771727922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2312961492 and 2312961501.

It is not an unprimeable number, because it can be changed into a prime (2312961551) 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, 385493586 + ... + 385493591.

It is an arithmetic number, because the mean of its divisors is an integer number (770987178).

Almost surely, 2^2312961531 is an apocalyptic number.

2312961531 is a deficient number, since it is larger than the sum of its proper divisors (770987181).

2312961531 is an equidigital number, since it uses as much as digits as its factorization.

2312961531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770987180.

The product of its digits is 9720, while the sum is 33.

The square root of 2312961531 is about 48093.2586855996. The cubic root of 2312961531 is about 1322.4810871566.

The spelling of 2312961531 in words is "two billion, three hundred twelve million, nine hundred sixty-one thousand, five hundred thirty-one".