45538621 has 2 divisors, whose sum is σ = 45538622. Its totient is φ = 45538620.

The previous prime is 45538589. The next prime is 45538657. The reversal of 45538621 is 12683554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32936121 + 12602500 = 5739^2 + 3550^2 .

It is a cyclic number.

It is not a de Polignac number, because 45538621 - 2⁵ = 45538589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45538021) 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 as a sum of consecutive naturals, namely, 22769310 + 22769311.

It is an arithmetic number, because the mean of its divisors is an integer number (22769311).

Almost surely, 2^45538621 is an apocalyptic number.

It is an amenable number.

45538621 is a deficient number, since it is larger than the sum of its proper divisors (1).

45538621 is an equidigital number, since it uses as much as digits as its factorization.

45538621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 34.

The square root of 45538621 is about 6748.2309533684. The cubic root of 45538621 is about 357.1028298226.

The spelling of 45538621 in words is "forty-five million, five hundred thirty-eight thousand, six hundred twenty-one".