45512172 has 24 divisors (see below), whose sum is σ = 117994800. Its totient is φ = 15170688.

The previous prime is 45512171. The next prime is 45512177. The reversal of 45512172 is 27121554.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (45512171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210597 + ... + 210812.

It is an arithmetic number, because the mean of its divisors is an integer number (4916450).

Almost surely, 2^45512172 is an apocalyptic number.

It is an amenable number.

45512172 is an abundant number, since it is smaller than the sum of its proper divisors (72482628).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

45512172 is a wasteful number, since it uses less digits than its factorization.

45512172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421422 (or 421414 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 45512172 is about 6746.2709699507. The cubic root of 45512172 is about 357.0336808842.

The spelling of 45512172 in words is "forty-five million, five hundred twelve thousand, one hundred seventy-two".