45642531 has 12 divisors (see below), whose sum is σ = 66892616. Its totient is φ = 27661920.

The previous prime is 45642529. The next prime is 45642533. The reversal of 45642531 is 13524654.

45642531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (45642529) and next prime (45642533).

It is not a de Polignac number, because 45642531 - 2¹ = 45642529 is a prime.

It is a super-2 number, since 2×45642531² = 4166481272171922, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45642533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 62506 + ... + 63231.

Almost surely, 2^45642531 is an apocalyptic number.

45642531 is a deficient number, since it is larger than the sum of its proper divisors (21250085).

45642531 is a wasteful number, since it uses less digits than its factorization.

45642531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125762 (or 125751 counting only the distinct ones).

The product of its digits is 14400, while the sum is 30.

The square root of 45642531 is about 6755.9256212602. The cubic root of 45642531 is about 357.3742358418.

The spelling of 45642531 in words is "forty-five million, six hundred forty-two thousand, five hundred thirty-one".