45521931 has 64 divisors (see below), whose sum is σ = 79027200. Its totient is φ = 23143680.

The previous prime is 45521923. The next prime is 45521941. The reversal of 45521931 is 13912554.

45521931 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45521931 - 2³ = 45521923 is a prime.

It is a super-2 number, since 2×45521931² = 4144492403937522, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (45521911) 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 63 ways as a sum of consecutive naturals, for example, 548416 + ... + 548498.

It is an arithmetic number, because the mean of its divisors is an integer number (1234800).

Almost surely, 2^45521931 is an apocalyptic number.

45521931 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

45521931 is a deficient number, since it is larger than the sum of its proper divisors (33505269).

45521931 is a wasteful number, since it uses less digits than its factorization.

45521931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 147 counting only the distinct ones).

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

The square root of 45521931 is about 6746.9942196507. The cubic root of 45521931 is about 357.0591981801.

The spelling of 45521931 in words is "forty-five million, five hundred twenty-one thousand, nine hundred thirty-one".