231269 has 2 divisors, whose sum is σ = 231270. Its totient is φ = 231268.

The previous prime is 231241. The next prime is 231271. The reversal of 231269 is 962132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 214369 + 16900 = 463^2 + 130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231269 is a prime.

It is a super-2 number, since 2×231269² = 106970700722, which contains 22 as substring.

Together with 231271, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115634 + 115635.

It is an arithmetic number, because the mean of its divisors is an integer number (115635).

2²³¹²⁶⁹ is an apocalyptic number.

It is an amenable number.

231269 is a deficient number, since it is larger than the sum of its proper divisors (1).

231269 is an equidigital number, since it uses as much as digits as its factorization.

231269 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 23.

The square root of 231269 is about 480.9043563953. The cubic root of 231269 is about 61.3817323028.

The spelling of 231269 in words is "two hundred thirty-one thousand, two hundred sixty-nine".