45531565 has 4 divisors (see below), whose sum is σ = 54637884. Its totient is φ = 36425248.

The previous prime is 45531557. The next prime is 45531583. The reversal of 45531565 is 56513554.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56513554 = 2 ⋅28256777.

It can be written as a sum of positive squares in 2 ways, for example, as 29387241 + 16144324 = 5421^2 + 4018^2 .

It is a cyclic number.

It is not a de Polignac number, because 45531565 - 2³ = 45531557 is a prime.

It is a super-2 number, since 2×45531565² = 4146246822698450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 45531565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4553152 + ... + 4553161.

It is an arithmetic number, because the mean of its divisors is an integer number (13659471).

Almost surely, 2^45531565 is an apocalyptic number.

It is an amenable number.

45531565 is a deficient number, since it is larger than the sum of its proper divisors (9106319).

45531565 is an equidigital number, since it uses as much as digits as its factorization.

45531565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9106318.

The product of its digits is 45000, while the sum is 34.

The square root of 45531565 is about 6747.7081294318. The cubic root of 45531565 is about 357.0843850559.

The spelling of 45531565 in words is "forty-five million, five hundred thirty-one thousand, five hundred sixty-five".