55113216 has 80 divisors (see below), whose sum is σ = 149816304. Its totient is φ = 17997824.

The previous prime is 55113211. The next prime is 55113251. The reversal of 55113216 is 61231155.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55113211) 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, 81070 + ... + 81746.

Almost surely, 2^55113216 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 55113216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74908152).

55113216 is an abundant number, since it is smaller than the sum of its proper divisors (94703088).

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

55113216 is an equidigital number, since it uses as much as digits as its factorization.

55113216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 735 counting only the distinct ones).

The product of its digits is 900, while the sum is 24.

The square root of 55113216 is about 7423.8275842048. The cubic root of 55113216 is about 380.5560096971.

The spelling of 55113216 in words is "fifty-five million, one hundred thirteen thousand, two hundred sixteen".