55509237 has 12 divisors (see below), whose sum is σ = 91634400. Its totient is φ = 31719528.

The previous prime is 55509217. The next prime is 55509239. The reversal of 55509237 is 73290555.

55509237 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55509237 - 2⁷ = 55509109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55509239) 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, 440487 + ... + 440612.

It is an arithmetic number, because the mean of its divisors is an integer number (7636200).

Almost surely, 2^55509237 is an apocalyptic number.

It is an amenable number.

55509237 is a deficient number, since it is larger than the sum of its proper divisors (36125163).

55509237 is a wasteful number, since it uses less digits than its factorization.

55509237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 881112 (or 881109 counting only the distinct ones).

The product of its (nonzero) digits is 47250, while the sum is 36.

The square root of 55509237 is about 7450.4521339312. The cubic root of 55509237 is about 381.4653416798.

The spelling of 55509237 in words is "fifty-five million, five hundred nine thousand, two hundred thirty-seven".