55155216 has 40 divisors (see below), whose sum is σ = 147401280. Its totient is φ = 17750656.

The previous prime is 55155179. The next prime is 55155227. The reversal of 55155216 is 61255155.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18420 + ... + 21203.

It is an arithmetic number, because the mean of its divisors is an integer number (3685032).

Almost surely, 2^55155216 is an apocalyptic number.

It is an amenable number.

55155216 is an abundant number, since it is smaller than the sum of its proper divisors (92246064).

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

55155216 is a wasteful number, since it uses less digits than its factorization.

55155216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39663 (or 39657 counting only the distinct ones).

The product of its digits is 7500, while the sum is 30.

The square root of 55155216 is about 7426.6557749771. The cubic root of 55155216 is about 380.6526549615.

It can be divided in two parts, 5515 and 5216, that added together give a triangular number (10731 = T₁₄₆).

The spelling of 55155216 in words is "fifty-five million, one hundred fifty-five thousand, two hundred sixteen".