231163020 has 144 divisors (see below), whose sum is σ = 769440672. Its totient is φ = 55710720.

The previous prime is 231162989. The next prime is 231163033. The reversal of 231163020 is 20361132.

231163020 is a `hidden beast` number, since 2 + 3 + 11 + 630 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 231162984 and 231163002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 619554 + ... + 619926.

It is an arithmetic number, because the mean of its divisors is an integer number (5343338).

Almost surely, 2^231163020 is an apocalyptic number.

231163020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231163020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384720336).

231163020 is an abundant number, since it is smaller than the sum of its proper divisors (538277652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231163020 is a wasteful number, since it uses less digits than its factorization.

231163020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 231163020 is about 15204.0461719899. The cubic root of 231163020 is about 613.7235472385.

The spelling of 231163020 in words is "two hundred thirty-one million, one hundred sixty-three thousand, twenty".