45645431 has 4 divisors (see below), whose sum is σ = 49156632. Its totient is φ = 42134232.

The previous prime is 45645427. The next prime is 45645433. The reversal of 45645431 is 13454654.

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

It is a cyclic number.

It is not a de Polignac number, because 45645431 - 2² = 45645427 is a prime.

It is a super-2 number, since 2×45645431² = 4167010742351522, 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 (45645433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1755581 + ... + 1755606.

It is an arithmetic number, because the mean of its divisors is an integer number (12289158).

Almost surely, 2^45645431 is an apocalyptic number.

45645431 is a deficient number, since it is larger than the sum of its proper divisors (3511201).

45645431 is a wasteful number, since it uses less digits than its factorization.

45645431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511200.

The product of its digits is 28800, while the sum is 32.

The square root of 45645431 is about 6756.1402442519. The cubic root of 45645431 is about 357.3818045379.

The spelling of 45645431 in words is "forty-five million, six hundred forty-five thousand, four hundred thirty-one".