45537581 has 2 divisors, whose sum is σ = 45537582. Its totient is φ = 45537580.

The previous prime is 45537533. The next prime is 45537587. The reversal of 45537581 is 18573554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41396356 + 4141225 = 6434^2 + 2035^2 .

It is a cyclic number.

It is not a de Polignac number, because 45537581 - 2⁶ = 45537517 is a prime.

It is a super-2 number, since 2×45537581² = 4147342566663122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45537587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22768790 + 22768791.

It is an arithmetic number, because the mean of its divisors is an integer number (22768791).

Almost surely, 2^45537581 is an apocalyptic number.

It is an amenable number.

45537581 is a deficient number, since it is larger than the sum of its proper divisors (1).

45537581 is an equidigital number, since it uses as much as digits as its factorization.

45537581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84000, while the sum is 38.

The square root of 45537581 is about 6748.1538956962. The cubic root of 45537581 is about 357.1001113259.

The spelling of 45537581 in words is "forty-five million, five hundred thirty-seven thousand, five hundred eighty-one".