55509633 has 12 divisors (see below), whose sum is σ = 80246608. Its totient is φ = 36975960.

The previous prime is 55509599. The next prime is 55509637. The reversal of 55509633 is 33690555.

It is a de Polignac number, because none of the positive numbers 2^k-55509633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55509637) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16566 + ... + 19632.

Almost surely, 2^55509633 is an apocalyptic number.

It is an amenable number.

55509633 is a deficient number, since it is larger than the sum of its proper divisors (24736975).

55509633 is a wasteful number, since it uses less digits than its factorization.

55509633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084 (or 5081 counting only the distinct ones).

The product of its (nonzero) digits is 60750, while the sum is 36.

The square root of 55509633 is about 7450.4787094522. The cubic root of 55509633 is about 381.4662487955.

The spelling of 55509633 in words is "fifty-five million, five hundred nine thousand, six hundred thirty-three".