999955222 has 16 divisors (see below), whose sum is σ = 1788740352. Its totient is φ = 409919400.

The previous prime is 999955211. The next prime is 999955223. The reversal of 999955222 is 222559999.

It is a happy number.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 999955222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999955223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1552404 + ... + 1553047.

It is an arithmetic number, because the mean of its divisors is an integer number (111796272).

Almost surely, 2^999955222 is an apocalyptic number.

999955222 is a deficient number, since it is larger than the sum of its proper divisors (788785130).

999955222 is a wasteful number, since it uses less digits than its factorization.

999955222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3105483.

The product of its digits is 1312200, while the sum is 52.

The square root of 999955222 is about 31622.0685914125. The cubic root of 999955222 is about 999.9850737772.

The spelling of 999955222 in words is "nine hundred ninety-nine million, nine hundred fifty-five thousand, two hundred twenty-two".