55611216 has 60 divisors (see below), whose sum is σ = 164796372. Its totient is φ = 17445888.

The previous prime is 55611197. The next prime is 55611221. The reversal of 55611216 is 61211655.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31404816 + 24206400 = 5604^2 + 4920^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 55611216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8911 + ... + 13806.

Almost surely, 2^55611216 is an apocalyptic number.

It is an amenable number.

55611216 is an abundant number, since it is smaller than the sum of its proper divisors (109185156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55611216 is a wasteful number, since it uses less digits than its factorization.

55611216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22748 (or 22739 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 55611216 is about 7457.2928063742. The cubic root of 55611216 is about 381.6988022581.

The spelling of 55611216 in words is "fifty-five million, six hundred eleven thousand, two hundred sixteen".