12815331 has 16 divisors (see below), whose sum is σ = 18403200. Its totient is φ = 7902848.

The previous prime is 12815317. The next prime is 12815353. The reversal of 12815331 is 13351821.

It is a cyclic number.

It is not a de Polignac number, because 12815331 - 2⁶ = 12815267 is a prime.

It is a super-2 number, since 2×12815331² = 328465417279122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12815731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 880 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (1150200).

Almost surely, 2^12815331 is an apocalyptic number.

12815331 is a deficient number, since it is larger than the sum of its proper divisors (5587869).

12815331 is a wasteful number, since it uses less digits than its factorization.

12815331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4338.

The product of its digits is 720, while the sum is 24.

The square root of 12815331 is about 3579.8506952106. The cubic root of 12815331 is about 234.0147737038.

The spelling of 12815331 in words is "twelve million, eight hundred fifteen thousand, three hundred thirty-one".