55924220 has 96 divisors (see below), whose sum is σ = 142974720. Its totient is φ = 18109440.

The previous prime is 55924213. The next prime is 55924229. The reversal of 55924220 is 2242955.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55924229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70667 + ... + 71453.

It is an arithmetic number, because the mean of its divisors is an integer number (1489320).

Almost surely, 2^55924220 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 55924220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71487360).

55924220 is an abundant number, since it is smaller than the sum of its proper divisors (87050500).

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

55924220 is a wasteful number, since it uses less digits than its factorization.

55924220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843 (or 841 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 55924220 is about 7478.2497952395. The cubic root of 55924220 is about 382.4135849326.

It can be divided in two parts, 55924 and 220, that multiplied together give a triangular number (12303280 = T₄₉₆₀).

The spelling of 55924220 in words is "fifty-five million, nine hundred twenty-four thousand, two hundred twenty".