45432521021 has 2 divisors, whose sum is σ = 45432521022. Its totient is φ = 45432521020.

The previous prime is 45432520997. The next prime is 45432521039. The reversal of 45432521021 is 12012523454.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33063967225 + 12368553796 = 181835^2 + 111214^2 .

It is a cyclic number.

It is not a de Polignac number, because 45432521021 - 2²² = 45428326717 is a prime.

It is a super-3 number, since 3×45432521021³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45432521221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22716260510 + 22716260511.

It is an arithmetic number, because the mean of its divisors is an integer number (22716260511).

Almost surely, 2^45432521021 is an apocalyptic number.

It is an amenable number.

45432521021 is a deficient number, since it is larger than the sum of its proper divisors (1).

45432521021 is an equidigital number, since it uses as much as digits as its factorization.

45432521021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

The spelling of 45432521021 in words is "forty-five billion, four hundred thirty-two million, five hundred twenty-one thousand, twenty-one".