45520031221 has 48 divisors (see below), whose sum is σ = 55422057600. Its totient is φ = 37231463808.

The previous prime is 45520031209. The next prime is 45520031309. The reversal of 45520031221 is 12213002554.

It is not a de Polignac number, because 45520031221 - 2⁹ = 45520030709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45520032221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62613160 + ... + 62613886.

It is an arithmetic number, because the mean of its divisors is an integer number (1154626200).

Almost surely, 2^45520031221 is an apocalyptic number.

It is an amenable number.

45520031221 is a deficient number, since it is larger than the sum of its proper divisors (9902026379).

45520031221 is a wasteful number, since it uses less digits than its factorization.

45520031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1226 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

Adding to 45520031221 its reverse (12213002554), we get a palindrome (57733033775).

The spelling of 45520031221 in words is "forty-five billion, five hundred twenty million, thirty-one thousand, two hundred twenty-one".