231623251 has 2 divisors, whose sum is σ = 231623252. Its totient is φ = 231623250.

The previous prime is 231623237. The next prime is 231623269. The reversal of 231623251 is 152326132.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 231623251 - 2²³ = 223234643 is a prime.

It is not a weakly prime, because it can be changed into another prime (231623201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115811625 + 115811626.

It is an arithmetic number, because the mean of its divisors is an integer number (115811626).

Almost surely, 2^231623251 is an apocalyptic number.

231623251 is a deficient number, since it is larger than the sum of its proper divisors (1).

231623251 is an equidigital number, since it uses as much as digits as its factorization.

231623251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 25.

The square root of 231623251 is about 15219.1737949207. The cubic root of 231623251 is about 614.1305722018.

Adding to 231623251 its reverse (152326132), we get a palindrome (383949383).

The spelling of 231623251 in words is "two hundred thirty-one million, six hundred twenty-three thousand, two hundred fifty-one".