163143921 has 8 divisors (see below), whose sum is σ = 217680160. Its totient is φ = 108685152.

The previous prime is 163143907. The next prime is 163143923. The reversal of 163143921 is 129341361.

163143921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 163143921 - 2¹⁵ = 163111153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163143923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14260 + ... + 23013.

It is an arithmetic number, because the mean of its divisors is an integer number (27210020).

Almost surely, 2^163143921 is an apocalyptic number.

It is an amenable number.

163143921 is a deficient number, since it is larger than the sum of its proper divisors (54536239).

163143921 is a wasteful number, since it uses less digits than its factorization.

163143921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38735.

The product of its digits is 3888, while the sum is 30.

The square root of 163143921 is about 12772.7804725518. The cubic root of 163143921 is about 546.4162821156.

The spelling of 163143921 in words is "one hundred sixty-three million, one hundred forty-three thousand, nine hundred twenty-one".