45375981 has 16 divisors (see below), whose sum is σ = 71529600. Its totient is φ = 25034688.

The previous prime is 45375977. The next prime is 45375989. The reversal of 45375981 is 18957354.

It is not a de Polignac number, because 45375981 - 2² = 45375977 is a prime.

It is a super-2 number, since 2×45375981² = 4117959303424722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45375989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36646 + ... + 37863.

It is an arithmetic number, because the mean of its divisors is an integer number (4470600).

Almost surely, 2^45375981 is an apocalyptic number.

It is an amenable number.

45375981 is a deficient number, since it is larger than the sum of its proper divisors (26153619).

45375981 is a wasteful number, since it uses less digits than its factorization.

45375981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74548.

The product of its digits is 151200, while the sum is 42.

The square root of 45375981 is about 6736.1696089098. The cubic root of 45375981 is about 356.6771948834.

The spelling of 45375981 in words is "forty-five million, three hundred seventy-five thousand, nine hundred eighty-one".