55642432 has 14 divisors (see below), whose sum is σ = 110415578. Its totient is φ = 27821184.

The previous prime is 55642423. The next prime is 55642511. The reversal of 55642432 is 23424655.

It can be written as a sum of positive squares in only one way, i.e., 36772096 + 18870336 = 6064^2 + 4344^2 .

It is a junction number, because it is equal to n+sod(n) for n = 55642394 and 55642403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434643 + ... + 434770.

It is an arithmetic number, because the mean of its divisors is an integer number (7886827).

Almost surely, 2^55642432 is an apocalyptic number.

It is an amenable number.

55642432 is a deficient number, since it is larger than the sum of its proper divisors (54773146).

55642432 is an equidigital number, since it uses as much as digits as its factorization.

55642432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869425 (or 869415 counting only the distinct ones).

The product of its digits is 28800, while the sum is 31.

The square root of 55642432 is about 7459.3854974790. The cubic root of 55642432 is about 381.7702080040.

The spelling of 55642432 in words is "fifty-five million, six hundred forty-two thousand, four hundred thirty-two".