999000222 has 64 divisors (see below), whose sum is σ = 2247416064. Its totient is φ = 293379840.

The previous prime is 999000173. The next prime is 999000271. The reversal of 999000222 is 222000999.

It is an interprime number because it is at equal distance from previous prime (999000173) and next prime (999000271).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 763693 + ... + 764999.

It is an arithmetic number, because the mean of its divisors is an integer number (35115876).

Almost surely, 2^999000222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999000222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1123708032).

999000222 is an abundant number, since it is smaller than the sum of its proper divisors (1248415842).

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

999000222 is a wasteful number, since it uses less digits than its factorization.

999000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 999000222 is about 31606.9647704426. The cubic root of 999000222 is about 999.6666295432. Note that the first 4 decimals are identical.

Adding to 999000222 its reverse (222000999), we get a palindrome (1221001221).

The spelling of 999000222 in words is "nine hundred ninety-nine million, two hundred twenty-two", and thus it is an aban number.