163865231 has 8 divisors (see below), whose sum is σ = 166761504. Its totient is φ = 160985440.

The previous prime is 163865209. The next prime is 163865237. The reversal of 163865231 is 132568361.

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 163865231 - 2¹⁴ = 163848847 is a prime.

It is a super-2 number, since 2×163865231² = 53703627861366722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163865191 and 163865200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163865237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16865 + ... + 24741.

It is an arithmetic number, because the mean of its divisors is an integer number (20845188).

Almost surely, 2^163865231 is an apocalyptic number.

163865231 is a deficient number, since it is larger than the sum of its proper divisors (2896273).

163865231 is an equidigital number, since it uses as much as digits as its factorization.

163865231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8241.

The product of its digits is 25920, while the sum is 35.

The square root of 163865231 is about 12800.9855479959. The cubic root of 163865231 is about 547.2203902989.

The spelling of 163865231 in words is "one hundred sixty-three million, eight hundred sixty-five thousand, two hundred thirty-one".