231931768770 has 240 divisors, whose sum is σ = 682924663080. Its totient is φ = 56446460928.

The previous prime is 231931768763. The next prime is 231931768787. The reversal of 231931768770 is 77867139132.

231931768770 is a `hidden beast` number, since 2 + 319 + 317 + 6 + 8 + 7 + 7 + 0 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 72129307761 + 159802461009 = 268569^2 + 399753^2 .

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 12173692 + ... + 12192728.

Almost surely, 2^231931768770 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231931768770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341462331540).

231931768770 is an abundant number, since it is smaller than the sum of its proper divisors (450992894310).

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

231931768770 is a wasteful number, since it uses less digits than its factorization.

231931768770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19171 (or 19149 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 54.

The spelling of 231931768770 in words is "two hundred thirty-one billion, nine hundred thirty-one million, seven hundred sixty-eight thousand, seven hundred seventy".