12315555 has 24 divisors (see below), whose sum is σ = 24397152. Its totient is φ = 5629824.

The previous prime is 12315529. The next prime is 12315559. The reversal of 12315555 is 55551321.

It is not a de Polignac number, because 12315555 - 2⁷ = 12315427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12315559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19234 + ... + 19863.

It is an arithmetic number, because the mean of its divisors is an integer number (1016548).

Almost surely, 2^12315555 is an apocalyptic number.

12315555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12315555 is a deficient number, since it is larger than the sum of its proper divisors (12081597).

12315555 is a wasteful number, since it uses less digits than its factorization.

12315555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39115 (or 39112 counting only the distinct ones).

The product of its digits is 3750, while the sum is 27.

The square root of 12315555 is about 3509.3525043803. The cubic root of 12315555 is about 230.9322902693.

Adding to 12315555 its reverse (55551321), we get a palindrome (67866876).

It can be divided in two parts, 1231 and 5555, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 12315555 in words is "twelve million, three hundred fifteen thousand, five hundred fifty-five".