55599222 has 48 divisors (see below), whose sum is σ = 130006512. Its totient is φ = 15805440.

The previous prime is 55599191. The next prime is 55599223. The reversal of 55599222 is 22299555.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55599223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82278 + ... + 82950.

It is an arithmetic number, because the mean of its divisors is an integer number (2708469).

Almost surely, 2^55599222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55599222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65003256).

55599222 is an abundant number, since it is smaller than the sum of its proper divisors (74407290).

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

55599222 is a wasteful number, since it uses less digits than its factorization.

55599222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 973 (or 966 counting only the distinct ones).

The product of its digits is 81000, while the sum is 39.

The square root of 55599222 is about 7456.4885837772. The cubic root of 55599222 is about 381.6713592053.

The spelling of 55599222 in words is "fifty-five million, five hundred ninety-nine thousand, two hundred twenty-two".