231287787632 has 80 divisors (see below), whose sum is σ = 501252917760. Its totient is φ = 102470131200.

The previous prime is 231287787593. The next prime is 231287787659. The reversal of 231287787632 is 236787782132.

231287787632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7944719 + ... + 7973777.

It is an arithmetic number, because the mean of its divisors is an integer number (6265661472).

Almost surely, 2^231287787632 is an apocalyptic number.

231287787632 is a gapful number since it is divisible by the number (22) 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 231287787632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250626458880).

231287787632 is an abundant number, since it is smaller than the sum of its proper divisors (269965130128).

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

231287787632 is a wasteful number, since it uses less digits than its factorization.

231287787632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30222 (or 30216 counting only the distinct ones).

The product of its digits is 9483264, while the sum is 56.

The spelling of 231287787632 in words is "two hundred thirty-one billion, two hundred eighty-seven million, seven hundred eighty-seven thousand, six hundred thirty-two".