999922226 has 4 divisors (see below), whose sum is σ = 1499883342. Its totient is φ = 499961112.

The previous prime is 999922223. The next prime is 999922243. The reversal of 999922226 is 622229999.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 622229999 = 37 ⋅16817027.

It can be written as a sum of positive squares in only one way, i.e., 985897201 + 14025025 = 31399^2 + 3745^2 .

It is not an unprimeable number, because it can be changed into a prime (999922223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249980555 + ... + 249980558.

Almost surely, 2^999922226 is an apocalyptic number.

999922226 is a deficient number, since it is larger than the sum of its proper divisors (499961116).

999922226 is a wasteful number, since it uses less digits than its factorization.

999922226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499961115.

The product of its digits is 629856, while the sum is 50.

The square root of 999922226 is about 31621.5468628592. The cubic root of 999922226 is about 999.9740746612.

The spelling of 999922226 in words is "nine hundred ninety-nine million, nine hundred twenty-two thousand, two hundred twenty-six".