163431730 has 64 divisors (see below), whose sum is σ = 386104320. Its totient is φ = 48254400.

The previous prime is 163431713. The next prime is 163431769. The reversal of 163431730 is 37134361.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9045 + ... + 20215.

It is an arithmetic number, because the mean of its divisors is an integer number (6032880).

Almost surely, 2^163431730 is an apocalyptic number.

163431730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163431730 is an abundant number, since it is smaller than the sum of its proper divisors (222672590).

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

163431730 is a wasteful number, since it uses less digits than its factorization.

163431730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11215.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 163431730 is about 12784.0420055630. The cubic root of 163431730 is about 546.7374119396.

The spelling of 163431730 in words is "one hundred sixty-three million, four hundred thirty-one thousand, seven hundred thirty".