163991226 has 32 divisors (see below), whose sum is σ = 383983488. Its totient is φ = 45711360.

The previous prime is 163991167. The next prime is 163991257. The reversal of 163991226 is 622199361.

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 an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45895 + ... + 49338.

It is an arithmetic number, because the mean of its divisors is an integer number (11999484).

Almost surely, 2^163991226 is an apocalyptic number.

163991226 is an abundant number, since it is smaller than the sum of its proper divisors (219992262).

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

163991226 is a wasteful number, since it uses less digits than its factorization.

163991226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95286.

The product of its digits is 34992, while the sum is 39.

The square root of 163991226 is about 12805.9059031370. The cubic root of 163991226 is about 547.3606058675.

The spelling of 163991226 in words is "one hundred sixty-three million, nine hundred ninety-one thousand, two hundred twenty-six".