231355020 has 192 divisors, whose sum is σ = 748500480. Its totient is φ = 52918272.

The previous prime is 231355013. The next prime is 231355021. The reversal of 231355020 is 20553132.

It is not an unprimeable number, because it can be changed into a prime (231355021) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 992824 + ... + 993056.

It is an arithmetic number, because the mean of its divisors is an integer number (3898440).

Almost surely, 2^231355020 is an apocalyptic number.

231355020 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 231355020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (374250240).

231355020 is an abundant number, since it is smaller than the sum of its proper divisors (517145460).

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

231355020 is a wasteful number, since it uses less digits than its factorization.

231355020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 231355020 is about 15210.3589701230. The cubic root of 231355020 is about 613.8934162661.

The spelling of 231355020 in words is "two hundred thirty-one million, three hundred fifty-five thousand, twenty".