45315521 has 4 divisors (see below), whose sum is σ = 46777344. Its totient is φ = 43853700.

The previous prime is 45315511. The next prime is 45315527. The reversal of 45315521 is 12551354.

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 a de Polignac number, because none of the positive numbers 2^k-45315521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45315527) 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, 730865 + ... + 730926.

It is an arithmetic number, because the mean of its divisors is an integer number (11694336).

Almost surely, 2^45315521 is an apocalyptic number.

It is an amenable number.

45315521 is a deficient number, since it is larger than the sum of its proper divisors (1461823).

45315521 is a wasteful number, since it uses less digits than its factorization.

45315521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1461822.

The product of its digits is 3000, while the sum is 26.

The square root of 45315521 is about 6731.6803994248. The cubic root of 45315521 is about 356.5187095086.

Adding to 45315521 its reverse (12551354), we get a palindrome (57866875).

The spelling of 45315521 in words is "forty-five million, three hundred fifteen thousand, five hundred twenty-one".