231881538131460 has 480 divisors, whose sum is σ = 836745941864448. Its totient is φ = 52657057393920.

The previous prime is 231881538131447. The next prime is 231881538131479. The reversal of 231881538131460 is 64131835188132.

231881538131460 is a `hidden beast` number, since 2 + 3 + 1 + 8 + 8 + 15 + 38 + 131 + 460 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 231881538131397 and 231881538131406.

It is an unprimeable number.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 3808361137 + ... + 3808422023.

Almost surely, 2^{231881538131460} is an apocalyptic number.

231881538131460 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 231881538131460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (418372970932224).

231881538131460 is an abundant number, since it is smaller than the sum of its proper divisors (604864403732988).

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

231881538131460 is a wasteful number, since it uses less digits than its factorization.

231881538131460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63093 (or 63082 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 231881538131460 in words is "two hundred thirty-one trillion, eight hundred eighty-one billion, five hundred thirty-eight million, one hundred thirty-one thousand, four hundred sixty".