45413313521 has 4 divisors (see below), whose sum is σ = 45413774832. Its totient is φ = 45412852212.

The previous prime is 45413313499. The next prime is 45413313529. The reversal of 45413313521 is 12531331454.

45413313521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 45413313521 - 2³⁰ = 44339571697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45413313529) 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, 17051 + ... + 301856.

It is an arithmetic number, because the mean of its divisors is an integer number (11353443708).

Almost surely, 2^45413313521 is an apocalyptic number.

It is an amenable number.

45413313521 is a deficient number, since it is larger than the sum of its proper divisors (461311).

45413313521 is a wasteful number, since it uses less digits than its factorization.

45413313521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461310.

The product of its digits is 21600, while the sum is 32.

Adding to 45413313521 its reverse (12531331454), we get a palindrome (57944644975).

The spelling of 45413313521 in words is "forty-five billion, four hundred thirteen million, three hundred thirteen thousand, five hundred twenty-one".