55220352 has 128 divisors (see below), whose sum is σ = 169646400. Its totient is φ = 15728640.

The previous prime is 55220293. The next prime is 55220353. The reversal of 55220352 is 25302255.

It is a tau number, because it is divible by the number of its divisors (128).

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 (55220353) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71424 + ... + 72192.

Almost surely, 2^55220352 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 55220352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84823200).

55220352 is an abundant number, since it is smaller than the sum of its proper divisors (114426048).

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

55220352 is a wasteful number, since it uses less digits than its factorization.

55220352 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814 (or 802 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 55220352 is about 7431.0397657394. The cubic root of 55220352 is about 380.8024409607.

It can be divided in two parts, 552203 and 52, that added together give a palindrome (552255).

The spelling of 55220352 in words is "fifty-five million, two hundred twenty thousand, three hundred fifty-two".