55500222 has 48 divisors (see below), whose sum is σ = 117497520. Its totient is φ = 17462016.

The previous prime is 55500217. The next prime is 55500227. The reversal of 55500222 is 22200555.

It is an interprime number because it is at equal distance from previous prime (55500217) and next prime (55500227).

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 (55500227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 623554 + ... + 623642.

It is an arithmetic number, because the mean of its divisors is an integer number (2447865).

Almost surely, 2^55500222 is an apocalyptic number.

55500222 is an abundant number, since it is smaller than the sum of its proper divisors (61997298).

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

55500222 is a wasteful number, since it uses less digits than its factorization.

55500222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 21.

The square root of 55500222 is about 7449.8471125252. The cubic root of 55500222 is about 381.4446898842. Note that the first 3 decimals are identical.

Adding to 55500222 its reverse (22200555), we get a palindrome (77700777).

The spelling of 55500222 in words is "fifty-five million, five hundred thousand, two hundred twenty-two".