2312815123 has 2 divisors, whose sum is σ = 2312815124. Its totient is φ = 2312815122.

The previous prime is 2312815111. The next prime is 2312815177. The reversal of 2312815123 is 3215182132.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2312815123 is a prime.

It is a super-2 number, since 2×2312815123² = 10698227586355010258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2312815091 and 2312815100.

It is not a weakly prime, because it can be changed into another prime (2312813123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1156407561 + 1156407562.

It is an arithmetic number, because the mean of its divisors is an integer number (1156407562).

Almost surely, 2^2312815123 is an apocalyptic number.

2312815123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2312815123 is an equidigital number, since it uses as much as digits as its factorization.

2312815123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 28.

The square root of 2312815123 is about 48091.7365355006. The cubic root of 2312815123 is about 1322.4531826866.

Adding to 2312815123 its reverse (3215182132), we get a palindrome (5527997255).

The spelling of 2312815123 in words is "two billion, three hundred twelve million, eight hundred fifteen thousand, one hundred twenty-three".