54405631 has 8 divisors (see below), whose sum is σ = 63447200. Its totient is φ = 46633104.

The previous prime is 54405629. The next prime is 54405677. The reversal of 54405631 is 13650445.

It is not a de Polignac number, because 54405631 - 2¹ = 54405629 is a prime.

It is a super-2 number, since 2×54405631² = 5919945369016322, 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 54405631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54405601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78966 + ... + 79651.

It is an arithmetic number, because the mean of its divisors is an integer number (7930900).

Almost surely, 2^54405631 is an apocalyptic number.

54405631 is a deficient number, since it is larger than the sum of its proper divisors (9041569).

54405631 is an equidigital number, since it uses as much as digits as its factorization.

54405631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158638 (or 158624 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 54405631 is about 7376.0172857715. The cubic root of 54405631 is about 378.9203681180.

The spelling of 54405631 in words is "fifty-four million, four hundred five thousand, six hundred thirty-one".