45521521 has 8 divisors (see below), whose sum is σ = 47625984. Its totient is φ = 43464480.

The previous prime is 45521519. The next prime is 45521537. The reversal of 45521521 is 12512554.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45521521 - 2¹ = 45521519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45521501) 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, 9885 + ... + 13738.

It is an arithmetic number, because the mean of its divisors is an integer number (5953248).

Almost surely, 2^45521521 is an apocalyptic number.

45521521 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

45521521 is a deficient number, since it is larger than the sum of its proper divisors (2104463).

45521521 is a wasteful number, since it uses less digits than its factorization.

45521521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23711.

The product of its digits is 2000, while the sum is 25.

The square root of 45521521 is about 6746.9638356819. The cubic root of 45521521 is about 357.0581262080.

The spelling of 45521521 in words is "forty-five million, five hundred twenty-one thousand, five hundred twenty-one".