231115933 has 2 divisors, whose sum is σ = 231115934. Its totient is φ = 231115932.

The previous prime is 231115931. The next prime is 231115939. The reversal of 231115933 is 339511132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 231100804 + 15129 = 15202^2 + 123^2 .

It is a cyclic number.

It is not a de Polignac number, because 231115933 - 2¹ = 231115931 is a prime.

Together with 231115931, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231115931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115557966 + 115557967.

It is an arithmetic number, because the mean of its divisors is an integer number (115557967).

Almost surely, 2^231115933 is an apocalyptic number.

It is an amenable number.

231115933 is a deficient number, since it is larger than the sum of its proper divisors (1).

231115933 is an equidigital number, since it uses as much as digits as its factorization.

231115933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2430, while the sum is 28.

The square root of 231115933 is about 15202.4975908566. The cubic root of 231115933 is about 613.6818733828.

The spelling of 231115933 in words is "two hundred thirty-one million, one hundred fifteen thousand, nine hundred thirty-three".