45522391 has 4 divisors (see below), whose sum is σ = 45991792. Its totient is φ = 45052992.

The previous prime is 45522383. The next prime is 45522397. The reversal of 45522391 is 19322554.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19322554 = 2 ⋅9661277.

It is a cyclic number.

It is not a de Polignac number, because 45522391 - 2³ = 45522383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45522397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234555 + ... + 234748.

It is an arithmetic number, because the mean of its divisors is an integer number (11497948).

Almost surely, 2^45522391 is an apocalyptic number.

45522391 is a deficient number, since it is larger than the sum of its proper divisors (469401).

45522391 is an equidigital number, since it uses as much as digits as its factorization.

45522391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469400.

The product of its digits is 10800, while the sum is 31.

The square root of 45522391 is about 6747.0283088186. The cubic root of 45522391 is about 357.0604008727.

The spelling of 45522391 in words is "forty-five million, five hundred twenty-two thousand, three hundred ninety-one".