163431655 has 8 divisors (see below), whose sum is σ = 196409232. Its totient is φ = 130551168.

The previous prime is 163431649. The next prime is 163431661. The reversal of 163431655 is 556134361.

It is an interprime number because it is at equal distance from previous prime (163431649) and next prime (163431661).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 163431655 - 2³ = 163431647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 163431655.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 20514 + ... + 27343.

It is an arithmetic number, because the mean of its divisors is an integer number (24551154).

Almost surely, 2^163431655 is an apocalyptic number.

163431655 is a deficient number, since it is larger than the sum of its proper divisors (32977577).

163431655 is an equidigital number, since it uses as much as digits as its factorization.

163431655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48545.

The product of its digits is 32400, while the sum is 34.

The square root of 163431655 is about 12784.0390722181. The cubic root of 163431655 is about 546.7373283056.

The spelling of 163431655 in words is "one hundred sixty-three million, four hundred thirty-one thousand, six hundred fifty-five".