231680133 has 6 divisors (see below), whose sum is σ = 334649094. Its totient is φ = 154453416.

The previous prime is 231680123. The next prime is 231680153. The reversal of 231680133 is 331086132.

It is a happy number.

231680133 is digitally balanced in base 2, 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., 210308004 + 21372129 = 14502^2 + 4623^2 .

It is not a de Polignac number, because 231680133 - 2¹² = 231676037 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231680097 and 231680106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231680123) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12871110 + ... + 12871127.

It is an arithmetic number, because the mean of its divisors is an integer number (55774849).

Almost surely, 2^231680133 is an apocalyptic number.

It is an amenable number.

231680133 is a deficient number, since it is larger than the sum of its proper divisors (102968961).

231680133 is a wasteful number, since it uses less digits than its factorization.

231680133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25742243 (or 25742240 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 231680133 is about 15221.0424413047. The cubic root of 231680133 is about 614.1808407821.

The spelling of 231680133 in words is "two hundred thirty-one million, six hundred eighty thousand, one hundred thirty-three".