99555222 has 32 divisors (see below), whose sum is σ = 216851040. Its totient is φ = 30286080.

The previous prime is 99555221. The next prime is 99555227. The reversal of 99555222 is 22255599.

It is a super-2 number, since 2×99555222² = 19822484454938568, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nialpdrome in base 10.

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 (99555221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229 + ... + 14112.

It is an arithmetic number, because the mean of its divisors is an integer number (6776595).

Almost surely, 2^99555222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 99555222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108425520).

99555222 is an abundant number, since it is smaller than the sum of its proper divisors (117295818).

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

99555222 is a wasteful number, since it uses less digits than its factorization.

99555222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14448.

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

The square root of 99555222 is about 9977.7363164197. The cubic root of 99555222 is about 463.4697017069.

The spelling of 99555222 in words is "ninety-nine million, five hundred fifty-five thousand, two hundred twenty-two".