163160021 has 4 divisors (see below), whose sum is σ = 163443372. Its totient is φ = 162876672.

The previous prime is 163160009. The next prime is 163160027. The reversal of 163160021 is 120061361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 126315121 + 36844900 = 11239^2 + 6070^2 .

It is a cyclic number.

It is not a de Polignac number, because 163160021 - 2²² = 158965717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 163159975 and 163160002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163160027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140810 + ... + 141963.

It is an arithmetic number, because the mean of its divisors is an integer number (40860843).

Almost surely, 2^163160021 is an apocalyptic number.

It is an amenable number.

163160021 is a deficient number, since it is larger than the sum of its proper divisors (283351).

163160021 is an equidigital number, since it uses as much as digits as its factorization.

163160021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283350.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 163160021 is about 12773.4107034887. The cubic root of 163160021 is about 546.4342560467.

The spelling of 163160021 in words is "one hundred sixty-three million, one hundred sixty thousand, twenty-one".