231280636 has 12 divisors (see below), whose sum is σ = 415680328. Its totient is φ = 112514832.

The previous prime is 231280619. The next prime is 231280639. The reversal of 231280636 is 636082132.

It is a junction number, because it is equal to n+sod(n) for n = 231280598 and 231280607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231280639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 781206 + ... + 781501.

Almost surely, 2^231280636 is an apocalyptic number.

It is an amenable number.

231280636 is a deficient number, since it is larger than the sum of its proper divisors (184399692).

231280636 is a wasteful number, since it uses less digits than its factorization.

231280636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562748 (or 1562746 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 231280636 is about 15207.9135978608. The cubic root of 231280636 is about 613.8276173298.

The spelling of 231280636 in words is "two hundred thirty-one million, two hundred eighty thousand, six hundred thirty-six".