231420253 has 2 divisors, whose sum is σ = 231420254. Its totient is φ = 231420252.

The previous prime is 231420229. The next prime is 231420401. The reversal of 231420253 is 352024132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 168662169 + 62758084 = 12987^2 + 7922^2 .

It is a cyclic number.

It is not a de Polignac number, because 231420253 - 2⁵ = 231420221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231420223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115710126 + 115710127.

It is an arithmetic number, because the mean of its divisors is an integer number (115710127).

Almost surely, 2^231420253 is an apocalyptic number.

It is an amenable number.

231420253 is a deficient number, since it is larger than the sum of its proper divisors (1).

231420253 is an equidigital number, since it uses as much as digits as its factorization.

231420253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 231420253 is about 15212.5031799504. The cubic root of 231420253 is about 613.9511087625.

Adding to 231420253 its reverse (352024132), we get a palindrome (583444385).

The spelling of 231420253 in words is "two hundred thirty-one million, four hundred twenty thousand, two hundred fifty-three".