2312815139 has 4 divisors (see below), whose sum is σ = 2342091360. Its totient is φ = 2283538920.

The previous prime is 2312815123. The next prime is 2312815177. The reversal of 2312815139 is 9315182132.

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 2312815139 - 2⁴ = 2312815123 is a prime.

It is a super-2 number, since 2×2312815139² = 10698227734375178642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2312815099 and 2312815108.

It is not an unprimeable number, because it can be changed into a prime (2312818139) 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, 14637992 + ... + 14638149.

It is an arithmetic number, because the mean of its divisors is an integer number (585522840).

Almost surely, 2^2312815139 is an apocalyptic number.

2312815139 is a deficient number, since it is larger than the sum of its proper divisors (29276221).

2312815139 is an equidigital number, since it uses as much as digits as its factorization.

2312815139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29276220.

The product of its digits is 12960, while the sum is 35.

The square root of 2312815139 is about 48091.7367018493. The cubic root of 2312815139 is about 1322.4531857362.

The spelling of 2312815139 in words is "two billion, three hundred twelve million, eight hundred fifteen thousand, one hundred thirty-nine".