231087760 has 20 divisors (see below), whose sum is σ = 537279228. Its totient is φ = 92435072.

The previous prime is 231087751. The next prime is 231087763. The reversal of 231087760 is 67780132.

It can be written as a sum of positive squares in 2 ways, for example, as 136142224 + 94945536 = 11668^2 + 9744^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (231087763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1444219 + ... + 1444378.

Almost surely, 2^231087760 is an apocalyptic number.

231087760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231087760 is an abundant number, since it is smaller than the sum of its proper divisors (306191468).

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

231087760 is a wasteful number, since it uses less digits than its factorization.

231087760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2888610 (or 2888604 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 231087760 is about 15201.5709714490. The cubic root of 231087760 is about 613.6569364579.

Subtracting from 231087760 its reverse (67780132), we obtain a triangular number (163307628 = T₁₈₀₇₂).

The spelling of 231087760 in words is "two hundred thirty-one million, eighty-seven thousand, seven hundred sixty".