231988276 has 12 divisors (see below), whose sum is σ = 437208772. Its totient is φ = 107071488.

The previous prime is 231988249. The next prime is 231988277. The reversal of 231988276 is 672889132.

It can be written as a sum of positive squares in 2 ways, for example, as 76387600 + 155600676 = 8740^2 + 12474^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231988277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2230605 + ... + 2230708.

Almost surely, 2^231988276 is an apocalyptic number.

231988276 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

231988276 is a deficient number, since it is larger than the sum of its proper divisors (205220496).

231988276 is a wasteful number, since it uses less digits than its factorization.

231988276 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4461330 (or 4461328 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 231988276 is about 15231.1613477108. The cubic root of 231988276 is about 614.4530144334.

The spelling of 231988276 in words is "two hundred thirty-one million, nine hundred eighty-eight thousand, two hundred seventy-six".