231772648 has 16 divisors (see below), whose sum is σ = 435949380. Its totient is φ = 115519488.

The previous prime is 231772589. The next prime is 231772661. The reversal of 231772648 is 846277132.

It can be written as a sum of positive squares in 2 ways, for example, as 185014404 + 46758244 = 13602^2 + 6838^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 231772648.

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 3 ways as a sum of consecutive naturals, for example, 43161 + ... + 48232.

Almost surely, 2^231772648 is an apocalyptic number.

It is an amenable number.

231772648 is a deficient number, since it is larger than the sum of its proper divisors (204176732).

231772648 is a wasteful number, since it uses less digits than its factorization.

231772648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91716 (or 91712 counting only the distinct ones).

The product of its digits is 112896, while the sum is 40.

The square root of 231772648 is about 15224.0811873820. The cubic root of 231772648 is about 614.2625818995.

The spelling of 231772648 in words is "two hundred thirty-one million, seven hundred seventy-two thousand, six hundred forty-eight".