163020881 has 8 divisors (see below), whose sum is σ = 166595520. Its totient is φ = 159484752.

The previous prime is 163020877. The next prime is 163020889. The reversal of 163020881 is 188020361.

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 163020881 - 2² = 163020877 is a prime.

It is a super-2 number, since 2×163020881² = 53151615284032322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163020889) 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, 986 + ... + 18083.

It is an arithmetic number, because the mean of its divisors is an integer number (20824440).

Almost surely, 2^163020881 is an apocalyptic number.

It is an amenable number.

163020881 is a deficient number, since it is larger than the sum of its proper divisors (3574639).

163020881 is a wasteful number, since it uses less digits than its factorization.

163020881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19255.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 163020881 is about 12767.9630716885. The cubic root of 163020881 is about 546.2788820264.

The spelling of 163020881 in words is "one hundred sixty-three million, twenty thousand, eight hundred eighty-one".