45195021 has 24 divisors (see below), whose sum is σ = 69120480. Its totient is φ = 28407456.

The previous prime is 45195013. The next prime is 45195037. The reversal of 45195021 is 12059154.

It is not a de Polignac number, because 45195021 - 2³ = 45195013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45195011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9210 + ... + 13236.

It is an arithmetic number, because the mean of its divisors is an integer number (2880020).

Almost surely, 2^45195021 is an apocalyptic number.

It is an amenable number.

45195021 is a deficient number, since it is larger than the sum of its proper divisors (23925459).

45195021 is a wasteful number, since it uses less digits than its factorization.

45195021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4105 (or 4102 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 45195021 is about 6722.7242245982. The cubic root of 45195021 is about 356.2024187607.

The spelling of 45195021 in words is "forty-five million, one hundred ninety-five thousand, twenty-one".