163271421 has 24 divisors (see below), whose sum is σ = 244647000. Its totient is φ = 104802432.

The previous prime is 163271401. The next prime is 163271443. The reversal of 163271421 is 124172361.

163271421 is a `hidden beast` number, since 1 + 632 + 7 + 1 + 4 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 101727396 + 61544025 = 10086^2 + 7845^2 .

It is not a de Polignac number, because 163271421 - 2⁹ = 163270909 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163271401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 132235 + ... + 133463.

It is an arithmetic number, because the mean of its divisors is an integer number (10193625).

Almost surely, 2^163271421 is an apocalyptic number.

It is an amenable number.

163271421 is a deficient number, since it is larger than the sum of its proper divisors (81375579).

163271421 is a wasteful number, since it uses less digits than its factorization.

163271421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773 (or 1770 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 163271421 is about 12777.7705801912. The cubic root of 163271421 is about 546.5585898695.

The spelling of 163271421 in words is "one hundred sixty-three million, two hundred seventy-one thousand, four hundred twenty-one".