45145581 has 8 divisors (see below), whose sum is σ = 64824480. Its totient is φ = 27781872.

The previous prime is 45145567. The next prime is 45145627. The reversal of 45145581 is 18554154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 45145581 - 2⁵ = 45145549 is a prime.

It is a super-2 number, since 2×45145581² = 4076246967655122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45135581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 578751 + ... + 578828.

It is an arithmetic number, because the mean of its divisors is an integer number (8103060).

Almost surely, 2^45145581 is an apocalyptic number.

It is an amenable number.

45145581 is a deficient number, since it is larger than the sum of its proper divisors (19678899).

45145581 is a wasteful number, since it uses less digits than its factorization.

45145581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157595.

The product of its digits is 16000, while the sum is 33.

The square root of 45145581 is about 6719.0461376597. The cubic root of 45145581 is about 356.0724850299.

The spelling of 45145581 in words is "forty-five million, one hundred forty-five thousand, five hundred eighty-one".