231509768 has 32 divisors (see below), whose sum is σ = 496618560. Its totient is φ = 99113280.

The previous prime is 231509749. The next prime is 231509779. The reversal of 231509768 is 867905132.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 75383 + ... + 78393.

It is an arithmetic number, because the mean of its divisors is an integer number (15519330).

Almost surely, 2^231509768 is an apocalyptic number.

231509768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

231509768 is an abundant number, since it is smaller than the sum of its proper divisors (265108792).

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

231509768 is a wasteful number, since it uses less digits than its factorization.

231509768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4397 (or 4393 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 231509768 is about 15215.4450477139. The cubic root of 231509768 is about 614.0302587768.

The spelling of 231509768 in words is "two hundred thirty-one million, five hundred nine thousand, seven hundred sixty-eight".