45322021 has 4 divisors (see below), whose sum is σ = 45584172. Its totient is φ = 45059872.

The previous prime is 45322019. The next prime is 45322027. The reversal of 45322021 is 12022354.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17969121 + 27352900 = 4239^2 + 5230^2 .

It is a cyclic number.

It is not a de Polignac number, because 45322021 - 2¹ = 45322019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45322021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45322027) 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, 130816 + ... + 131161.

It is an arithmetic number, because the mean of its divisors is an integer number (11396043).

Almost surely, 2^45322021 is an apocalyptic number.

It is an amenable number.

45322021 is a deficient number, since it is larger than the sum of its proper divisors (262151).

45322021 is a wasteful number, since it uses less digits than its factorization.

45322021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262150.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 45322021 is about 6732.1631738989. The cubic root of 45322021 is about 356.5357548885.

Adding to 45322021 its reverse (12022354), we get a palindrome (57344375).

The spelling of 45322021 in words is "forty-five million, three hundred twenty-two thousand, twenty-one".