231655162273920 has 2048 divisors, whose sum is σ = 1057142596608000. Its totient is φ = 46545253171200.

The previous prime is 231655162273903. The next prime is 231655162273943. The reversal of 231655162273920 is 29372261556132.

231655162273920 is a `hidden beast` number, since 2 + 3 + 1 + 6 + 5 + 5 + 1 + 622 + 7 + 3 + 9 + 2 + 0 = 666.

It is a super-2 number, since 2×231655162273920² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 6164465691 + ... + 6164503269.

It is an arithmetic number, because the mean of its divisors is an integer number (516182908500).

Almost surely, 2^{231655162273920} is an apocalyptic number.

231655162273920 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 231655162273920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (528571298304000).

231655162273920 is an abundant number, since it is smaller than the sum of its proper divisors (825487434334080).

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

231655162273920 is a wasteful number, since it uses less digits than its factorization.

231655162273920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37779 (or 37761 counting only the distinct ones).

The product of its (nonzero) digits is 8164800, while the sum is 54.

The spelling of 231655162273920 in words is "two hundred thirty-one trillion, six hundred fifty-five billion, one hundred sixty-two million, two hundred seventy-three thousand, nine hundred twenty".