231891868253 has 2 divisors, whose sum is σ = 231891868254. Its totient is φ = 231891868252.

The previous prime is 231891868237. The next prime is 231891868331. The reversal of 231891868253 is 352868198132.

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., 229530102649 + 2361765604 = 479093^2 + 48598^2 .

It is a cyclic number.

It is not a de Polignac number, because 231891868253 - 2⁴ = 231891868237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231891468253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115945934126 + 115945934127.

It is an arithmetic number, because the mean of its divisors is an integer number (115945934127).

Almost surely, 2^231891868253 is an apocalyptic number.

It is an amenable number.

231891868253 is a deficient number, since it is larger than the sum of its proper divisors (1).

231891868253 is an equidigital number, since it uses as much as digits as its factorization.

231891868253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 56.

The spelling of 231891868253 in words is "two hundred thirty-one billion, eight hundred ninety-one million, eight hundred sixty-eight thousand, two hundred fifty-three".