55509933 has 16 divisors (see below), whose sum is σ = 76608000. Its totient is φ = 35715840.

The previous prime is 55509931. The next prime is 55509977. The reversal of 55509933 is 33990555.

It is not a de Polignac number, because 55509933 - 2¹ = 55509931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55509891 and 55509900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55509931) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52393 + ... + 53441.

It is an arithmetic number, because the mean of its divisors is an integer number (4788000).

Almost surely, 2^55509933 is an apocalyptic number.

It is an amenable number.

55509933 is a deficient number, since it is larger than the sum of its proper divisors (21098067).

55509933 is a wasteful number, since it uses less digits than its factorization.

55509933 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1652.

The product of its (nonzero) digits is 91125, while the sum is 39.

The square root of 55509933 is about 7450.4988423595. The cubic root of 55509933 is about 381.4669360016.

The spelling of 55509933 in words is "fifty-five million, five hundred nine thousand, nine hundred thirty-three".