45043581 has 12 divisors (see below), whose sum is σ = 66014816. Its totient is φ = 27298920.

The previous prime is 45043577. The next prime is 45043627. The reversal of 45043581 is 18534054.

It is not a de Polignac number, because 45043581 - 2² = 45043577 is a prime.

It is a super-2 number, since 2×45043581² = 4057848378607122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45043501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61681 + ... + 62406.

Almost surely, 2^45043581 is an apocalyptic number.

It is an amenable number.

45043581 is a deficient number, since it is larger than the sum of its proper divisors (20971235).

45043581 is a wasteful number, since it uses less digits than its factorization.

45043581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124112 (or 124101 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 45043581 is about 6711.4514823546. The cubic root of 45043581 is about 355.8041178211.

The spelling of 45043581 in words is "forty-five million, forty-three thousand, five hundred eighty-one".