231012133 has 16 divisors (see below), whose sum is σ = 268660800. Its totient is φ = 196307200.

The previous prime is 231012113. The next prime is 231012143. The reversal of 231012133 is 331210132.

It is a cyclic number.

It is not a de Polignac number, because 231012133 - 2⁵ = 231012101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231012113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23718 + ... + 32008.

It is an arithmetic number, because the mean of its divisors is an integer number (16791300).

Almost surely, 2^231012133 is an apocalyptic number.

It is an amenable number.

231012133 is a deficient number, since it is larger than the sum of its proper divisors (37648667).

231012133 is a wasteful number, since it uses less digits than its factorization.

231012133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8468.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 231012133 is about 15199.0832947254. The cubic root of 231012133 is about 613.5899862846.

Adding to 231012133 its reverse (331210132), we get a palindrome (562222265).

The spelling of 231012133 in words is "two hundred thirty-one million, twelve thousand, one hundred thirty-three".