45525521 has 4 divisors (see below), whose sum is σ = 46297200. Its totient is φ = 44753844.

The previous prime is 45525509. The next prime is 45525527. The reversal of 45525521 is 12552554.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45525521 - 2¹⁴ = 45509137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45525527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 385751 + ... + 385868.

It is an arithmetic number, because the mean of its divisors is an integer number (11574300).

Almost surely, 2^45525521 is an apocalyptic number.

It is an amenable number.

45525521 is a deficient number, since it is larger than the sum of its proper divisors (771679).

45525521 is an equidigital number, since it uses as much as digits as its factorization.

45525521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771678.

The product of its digits is 10000, while the sum is 29.

The square root of 45525521 is about 6747.2602588013. The cubic root of 45525521 is about 357.0685841969.

The spelling of 45525521 in words is "forty-five million, five hundred twenty-five thousand, five hundred twenty-one".