231399248 has 10 divisors (see below), whose sum is σ = 448336074. Its totient is φ = 115699616.

The previous prime is 231399247. The next prime is 231399263. The reversal of 231399248 is 842993132.

231399248 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 225961024 + 5438224 = 15032^2 + 2332^2 .

It is a super-2 number, since 2×231399248² = 107091223949931008, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231399247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7231211 + ... + 7231242.

Almost surely, 2^231399248 is an apocalyptic number.

It is an amenable number.

231399248 is a deficient number, since it is larger than the sum of its proper divisors (216936826).

231399248 is a wasteful number, since it uses less digits than its factorization.

231399248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14462461 (or 14462455 counting only the distinct ones).

The product of its digits is 93312, while the sum is 41.

The square root of 231399248 is about 15211.8127782326. The cubic root of 231399248 is about 613.9325329852.

The spelling of 231399248 in words is "two hundred thirty-one million, three hundred ninety-nine thousand, two hundred forty-eight".