45008581 has 2 divisors, whose sum is σ = 45008582. Its totient is φ = 45008580.

The previous prime is 45008543. The next prime is 45008597. The reversal of 45008581 is 18580054.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43020481 + 1988100 = 6559^2 + 1410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45008581 is a prime.

It is a super-2 number, since 2×45008581² = 4051544727267122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45008521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22504290 + 22504291.

It is an arithmetic number, because the mean of its divisors is an integer number (22504291).

Almost surely, 2^45008581 is an apocalyptic number.

It is an amenable number.

45008581 is a deficient number, since it is larger than the sum of its proper divisors (1).

45008581 is an equidigital number, since it uses as much as digits as its factorization.

45008581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 45008581 is about 6708.8434919888. The cubic root of 45008581 is about 355.7119376798.

The spelling of 45008581 in words is "forty-five million, eight thousand, five hundred eighty-one".