45591181 has 2 divisors, whose sum is σ = 45591182. Its totient is φ = 45591180.

The previous prime is 45591179. The next prime is 45591187. The reversal of 45591181 is 18119554.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44435556 + 1155625 = 6666^2 + 1075^2 .

It is a cyclic number.

It is not a de Polignac number, because 45591181 - 2¹ = 45591179 is a prime.

It is a super-2 number, since 2×45591181² = 4157111569949522, which contains 22 as substring.

Together with 45591179, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (45591187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22795590 + 22795591.

It is an arithmetic number, because the mean of its divisors is an integer number (22795591).

Almost surely, 2^45591181 is an apocalyptic number.

It is an amenable number.

45591181 is a deficient number, since it is larger than the sum of its proper divisors (1).

45591181 is an equidigital number, since it uses as much as digits as its factorization.

45591181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 34.

The square root of 45591181 is about 6752.1241842845. The cubic root of 45591181 is about 357.2401645937.

The spelling of 45591181 in words is "forty-five million, five hundred ninety-one thousand, one hundred eighty-one".