45631557 has 12 divisors (see below), whose sum is σ = 67445664. Its totient is φ = 29713320.

The previous prime is 45631543. The next prime is 45631561. The reversal of 45631557 is 75513654.

45631557 is a `hidden beast` number, since 45 + 63 + 1 + 557 = 666.

It is not a de Polignac number, because 45631557 - 2⁸ = 45631301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45631507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 58569 + ... + 59342.

It is an arithmetic number, because the mean of its divisors is an integer number (5620472).

Almost surely, 2^45631557 is an apocalyptic number.

It is an amenable number.

45631557 is a deficient number, since it is larger than the sum of its proper divisors (21814107).

45631557 is a wasteful number, since it uses less digits than its factorization.

45631557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117960 (or 117957 counting only the distinct ones).

The product of its digits is 63000, while the sum is 36.

The square root of 45631557 is about 6755.1133965315. The cubic root of 45631557 is about 357.3455919495.

The spelling of 45631557 in words is "forty-five million, six hundred thirty-one thousand, five hundred fifty-seven".