55581836 has 12 divisors (see below), whose sum is σ = 97334160. Its totient is φ = 27772080.

The previous prime is 55581817. The next prime is 55581839. The reversal of 55581836 is 63818555.

It is a junction number, because it is equal to n+sod(n) for n = 55581793 and 55581802.

It is not an unprimeable number, because it can be changed into a prime (55581839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3530 + ... + 11118.

It is an arithmetic number, because the mean of its divisors is an integer number (8111180).

Almost surely, 2^55581836 is an apocalyptic number.

It is an amenable number.

55581836 is a deficient number, since it is larger than the sum of its proper divisors (41752324).

55581836 is a wasteful number, since it uses less digits than its factorization.

55581836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9424 (or 9422 counting only the distinct ones).

The product of its digits is 144000, while the sum is 41.

The square root of 55581836 is about 7455.3226623668. The cubic root of 55581836 is about 381.6315718977.

The spelling of 55581836 in words is "fifty-five million, five hundred eighty-one thousand, eight hundred thirty-six".