55213056 has 88 divisors (see below), whose sum is σ = 163596240. Its totient is φ = 18395136.

The previous prime is 55213051. The next prime is 55213091. The reversal of 55213056 is 65031255.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55213051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26650 + ... + 28646.

Almost surely, 2^55213056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55213056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81798120).

55213056 is an abundant number, since it is smaller than the sum of its proper divisors (108383184).

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

55213056 is a wasteful number, since it uses less digits than its factorization.

55213056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026 (or 2002 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The square root of 55213056 is about 7430.5488357187. The cubic root of 55213056 is about 380.7856690226.

The spelling of 55213056 in words is "fifty-five million, two hundred thirteen thousand, fifty-six".