163215994 has 12 divisors (see below), whose sum is σ = 246222522. Its totient is φ = 81144440.

The previous prime is 163215919. The next prime is 163216021. The reversal of 163215994 is 499512361.

It can be written as a sum of positive squares in only one way, i.e., 118526769 + 44689225 = 10887^2 + 6685^2 .

Its product of digits (58320) is a multiple of the sum of its prime divisors (2430).

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 71844 + ... + 74080.

Almost surely, 2^163215994 is an apocalyptic number.

163215994 is a deficient number, since it is larger than the sum of its proper divisors (83006528).

163215994 is an equidigital number, since it uses as much as digits as its factorization.

163215994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2621 (or 2430 counting only the distinct ones).

The product of its digits is 58320, while the sum is 40.

The square root of 163215994 is about 12775.6015122577. The cubic root of 163215994 is about 546.4967347257.

The spelling of 163215994 in words is "one hundred sixty-three million, two hundred fifteen thousand, nine hundred ninety-four".