45931215 has 48 divisors (see below), whose sum is σ = 83281536. Its totient is φ = 21436800.

The previous prime is 45931129. The next prime is 45931219. The reversal of 45931215 is 51213954.

It is not a de Polignac number, because 45931215 - 2⁸ = 45930959 is a prime.

It is a super-2 number, since 2×45931215² = 4219353022752450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45931219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138600 + ... + 138930.

It is an arithmetic number, because the mean of its divisors is an integer number (1735032).

Almost surely, 2^45931215 is an apocalyptic number.

45931215 is a deficient number, since it is larger than the sum of its proper divisors (37350321).

45931215 is a wasteful number, since it uses less digits than its factorization.

45931215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 379 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 45931215 is about 6777.2571885682. The cubic root of 45931215 is about 358.1261038437.

The spelling of 45931215 in words is "forty-five million, nine hundred thirty-one thousand, two hundred fifteen".