45518581 has 2 divisors, whose sum is σ = 45518582. Its totient is φ = 45518580.

The previous prime is 45518563. The next prime is 45518591. The reversal of 45518581 is 18581554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44823025 + 695556 = 6695^2 + 834^2 .

It is a cyclic number.

It is not a de Polignac number, because 45518581 - 2¹³ = 45510389 is a prime.

It is a super-2 number, since 2×45518581² = 4143882432507122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 45518581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45518531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22759290 + 22759291.

It is an arithmetic number, because the mean of its divisors is an integer number (22759291).

Almost surely, 2^45518581 is an apocalyptic number.

It is an amenable number.

45518581 is a deficient number, since it is larger than the sum of its proper divisors (1).

45518581 is an equidigital number, since it uses as much as digits as its factorization.

45518581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32000, while the sum is 37.

The square root of 45518581 is about 6746.7459563852. The cubic root of 45518581 is about 357.0504391956.

The spelling of 45518581 in words is "forty-five million, five hundred eighteen thousand, five hundred eighty-one".