999222022 has 16 divisors (see below), whose sum is σ = 1589153472. Its totient is φ = 469584000.

The previous prime is 999222017. The next prime is 999222023. The reversal of 999222022 is 220222999.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999222023) 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 7 ways as a sum of consecutive naturals, for example, 5968 + ... + 45100.

It is an arithmetic number, because the mean of its divisors is an integer number (99322092).

Almost surely, 2^999222022 is an apocalyptic number.

999222022 is a deficient number, since it is larger than the sum of its proper divisors (589931450).

999222022 is a wasteful number, since it uses less digits than its factorization.

999222022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39903.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 999222022 is about 31610.4732960454. The cubic root of 999222022 is about 999.7406067209.

The spelling of 999222022 in words is "nine hundred ninety-nine million, two hundred twenty-two thousand, twenty-two".