231763640 has 32 divisors (see below), whose sum is σ = 544142880. Its totient is φ = 88674432.

The previous prime is 231763633. The next prime is 231763681. The reversal of 231763640 is 46367132.

It is a junction number, because it is equal to n+sod(n) for n = 231763597 and 231763606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125039 + ... + 126878.

It is an arithmetic number, because the mean of its divisors is an integer number (17004465).

Almost surely, 2^231763640 is an apocalyptic number.

231763640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231763640 is an abundant number, since it is smaller than the sum of its proper divisors (312379240).

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

231763640 is a wasteful number, since it uses less digits than its factorization.

231763640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251951 (or 251947 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 231763640 is about 15223.7853374251. The cubic root of 231763640 is about 614.2546238868.

The spelling of 231763640 in words is "two hundred thirty-one million, seven hundred sixty-three thousand, six hundred forty".