163071021 has 16 divisors (see below), whose sum is σ = 230606784. Its totient is φ = 102146304.

The previous prime is 163071017. The next prime is 163071023. The reversal of 163071021 is 120170361.

It is not a de Polignac number, because 163071021 - 2² = 163071017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163071023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32166 + ... + 36888.

It is an arithmetic number, because the mean of its divisors is an integer number (14412924).

Almost surely, 2^163071021 is an apocalyptic number.

It is an amenable number.

163071021 is a deficient number, since it is larger than the sum of its proper divisors (67535763).

163071021 is a wasteful number, since it uses less digits than its factorization.

163071021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5420.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 163071021 is about 12769.9264289188. The cubic root of 163071021 is about 546.3348822462.

The spelling of 163071021 in words is "one hundred sixty-three million, seventy-one thousand, twenty-one".