231223933 has 2 divisors, whose sum is σ = 231223934. Its totient is φ = 231223932.

The previous prime is 231223913. The next prime is 231223957. The reversal of 231223933 is 339322132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 230219929 + 1004004 = 15173^2 + 1002^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231223933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231223913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115611966 + 115611967.

It is an arithmetic number, because the mean of its divisors is an integer number (115611967).

Almost surely, 2^231223933 is an apocalyptic number.

It is an amenable number.

231223933 is a deficient number, since it is larger than the sum of its proper divisors (1).

231223933 is an equidigital number, since it uses as much as digits as its factorization.

231223933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 28.

The square root of 231223933 is about 15206.0492239109. The cubic root of 231223933 is about 613.7774492558. Note that the first 3 decimals are identical.

The spelling of 231223933 in words is "two hundred thirty-one million, two hundred twenty-three thousand, nine hundred thirty-three".