45332821 has 4 divisors (see below), whose sum is σ = 46076044. Its totient is φ = 44589600.

The previous prime is 45332809. The next prime is 45332843. The reversal of 45332821 is 12823354.

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 509796 + 44823025 = 714^2 + 6695^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45332821 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 45332821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45332801) 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, 371520 + ... + 371641.

It is an arithmetic number, because the mean of its divisors is an integer number (11519011).

Almost surely, 2^45332821 is an apocalyptic number.

It is an amenable number.

45332821 is a deficient number, since it is larger than the sum of its proper divisors (743223).

45332821 is an equidigital number, since it uses as much as digits as its factorization.

45332821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743222.

The product of its digits is 5760, while the sum is 28.

The square root of 45332821 is about 6732.9652457146. The cubic root of 45332821 is about 356.5640728397.

The spelling of 45332821 in words is "forty-five million, three hundred thirty-two thousand, eight hundred twenty-one".