45184681 has 4 divisors (see below), whose sum is σ = 45314500. Its totient is φ = 45054864.

The previous prime is 45184663. The next prime is 45184693. The reversal of 45184681 is 18648154.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17264025 + 27920656 = 4155^2 + 5284^2 .

It is a cyclic number.

It is not a de Polignac number, because 45184681 - 2⁵ = 45184649 is a prime.

It is a super-2 number, since 2×45184681² = 4083310794143522, 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 45184681.

It is not an unprimeable number, because it can be changed into a prime (45184621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64386 + ... + 65083.

It is an arithmetic number, because the mean of its divisors is an integer number (11328625).

Almost surely, 2^45184681 is an apocalyptic number.

It is an amenable number.

45184681 is a deficient number, since it is larger than the sum of its proper divisors (129819).

45184681 is a wasteful number, since it uses less digits than its factorization.

45184681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129818.

The product of its digits is 30720, while the sum is 37.

The square root of 45184681 is about 6721.9551471280. The cubic root of 45184681 is about 356.1752519486.

The spelling of 45184681 in words is "forty-five million, one hundred eighty-four thousand, six hundred eighty-one".