45501521 has 16 divisors (see below), whose sum is σ = 52792320. Its totient is φ = 38871360.

The previous prime is 45501497. The next prime is 45501539. The reversal of 45501521 is 12510554.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 45501521 - 2⁶ = 45501457 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45501541) 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, 6815 + ... + 11723.

It is an arithmetic number, because the mean of its divisors is an integer number (3299520).

Almost surely, 2^45501521 is an apocalyptic number.

It is an amenable number.

45501521 is a deficient number, since it is larger than the sum of its proper divisors (7290799).

45501521 is a wasteful number, since it uses less digits than its factorization.

45501521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4976.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 45501521 is about 6745.4815246949. The cubic root of 45501521 is about 357.0058270724.

The spelling of 45501521 in words is "forty-five million, five hundred one thousand, five hundred twenty-one".