231783126120 has 576 divisors, whose sum is σ = 948759149520. Its totient is φ = 48641015808.

The previous prime is 231783126097. The next prime is 231783126131. The reversal of 231783126120 is 21621387132.

231783126120 is a `hidden beast` number, since 2 + 3 + 1 + 7 + 8 + 31 + 2 + 612 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 69990935364 + 161792190756 = 264558^2 + 402234^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 44256142 + ... + 44261378.

Almost surely, 2^231783126120 is an apocalyptic number.

231783126120 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 231783126120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474379574760).

231783126120 is an abundant number, since it is smaller than the sum of its proper divisors (716976023400).

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

231783126120 is a wasteful number, since it uses less digits than its factorization.

231783126120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5474 (or 5460 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 231783126120 in words is "two hundred thirty-one billion, seven hundred eighty-three million, one hundred twenty-six thousand, one hundred twenty".