55009216 has 28 divisors (see below), whose sum is σ = 109517688. Its totient is φ = 27414272.

The previous prime is 55009193. The next prime is 55009243. The reversal of 55009216 is 61290055.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20970 + ... + 23446.

It is an arithmetic number, because the mean of its divisors is an integer number (3911346).

Almost surely, 2^55009216 is an apocalyptic number.

It is an amenable number.

55009216 is a deficient number, since it is larger than the sum of its proper divisors (54508472).

55009216 is a wasteful number, since it uses less digits than its factorization.

55009216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2836 (or 2826 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 55009216 is about 7416.8198036625. The cubic root of 55009216 is about 380.3164861079.

It can be divided in two parts, 55009 and 216, that added together give a square (55225 = 235²).

The spelling of 55009216 in words is "fifty-five million, nine thousand, two hundred sixteen".