45371621 has 2 divisors, whose sum is σ = 45371622. Its totient is φ = 45371620.

The previous prime is 45371611. The next prime is 45371659. The reversal of 45371621 is 12617354.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38812900 + 6558721 = 6230^2 + 2561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45371621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45371611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22685810 + 22685811.

It is an arithmetic number, because the mean of its divisors is an integer number (22685811).

Almost surely, 2^45371621 is an apocalyptic number.

It is an amenable number.

45371621 is a deficient number, since it is larger than the sum of its proper divisors (1).

45371621 is an equidigital number, since it uses as much as digits as its factorization.

45371621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 29.

The square root of 45371621 is about 6735.8459750799. The cubic root of 45371621 is about 356.6657706133.

Adding to 45371621 its reverse (12617354), we get a palindrome (57988975).

The spelling of 45371621 in words is "forty-five million, three hundred seventy-one thousand, six hundred twenty-one".