231083565120 has 280 divisors, whose sum is σ = 844224746904. Its totient is φ = 59956568064.

The previous prime is 231083565077. The next prime is 231083565161. The reversal of 231083565120 is 21565380132.

231083565120 is a `hidden beast` number, since 2 + 3 + 1 + 0 + 83 + 565 + 12 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 126713217024 + 104370348096 = 355968^2 + 323064^2 .

It is a super-2 number, since 2×231083565120² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 838564 + ... + 1079516.

Almost surely, 2^231083565120 is an apocalyptic number.

231083565120 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 231083565120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422112373452).

231083565120 is an abundant number, since it is smaller than the sum of its proper divisors (613141181784).

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

231083565120 is a wasteful number, since it uses less digits than its factorization.

231083565120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241019 (or 241000 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The spelling of 231083565120 in words is "two hundred thirty-one billion, eighty-three million, five hundred sixty-five thousand, one hundred twenty".