45187165 has 4 divisors (see below), whose sum is σ = 54224604. Its totient is φ = 36149728.

The previous prime is 45187151. The next prime is 45187171. The reversal of 45187165 is 56178154.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56178154 = 2 ⋅28089077.

It can be written as a sum of positive squares in 2 ways, for example, as 29354724 + 15832441 = 5418^2 + 3979^2 .

It is a cyclic number.

It is not a de Polignac number, because 45187165 - 2²¹ = 43090013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4518712 + ... + 4518721.

It is an arithmetic number, because the mean of its divisors is an integer number (13556151).

Almost surely, 2^45187165 is an apocalyptic number.

It is an amenable number.

45187165 is a deficient number, since it is larger than the sum of its proper divisors (9037439).

45187165 is an equidigital number, since it uses as much as digits as its factorization.

45187165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9037438.

The product of its digits is 33600, while the sum is 37.

The square root of 45187165 is about 6722.1399122601. The cubic root of 45187165 is about 356.1817786673.

It can be divided in two parts, 451 and 87165, that added together give a square (87616 = 296²).

The spelling of 45187165 in words is "forty-five million, one hundred eighty-seven thousand, one hundred sixty-five".