231012428 has 12 divisors (see below), whose sum is σ = 405208440. Its totient is φ = 115238592.

The previous prime is 231012427. The next prime is 231012479. The reversal of 231012428 is 824210132.

It is a happy number.

231012428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231012427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64958 + ... + 68421.

It is an arithmetic number, because the mean of its divisors is an integer number (33767370).

Almost surely, 2^231012428 is an apocalyptic number.

It is an amenable number.

231012428 is a deficient number, since it is larger than the sum of its proper divisors (174196012).

231012428 is a wasteful number, since it uses less digits than its factorization.

231012428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133816 (or 133814 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 231012428 is about 15199.0929992549. The cubic root of 231012428 is about 613.5902474671.

The spelling of 231012428 in words is "two hundred thirty-one million, twelve thousand, four hundred twenty-eight".