231611269 has 2 divisors, whose sum is σ = 231611270. Its totient is φ = 231611268.

The previous prime is 231611257. The next prime is 231611279. The reversal of 231611269 is 962116132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 202720644 + 28890625 = 14238^2 + 5375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231611269 is a prime.

It is a super-2 number, since 2×231611269² = 107287559855580722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 231611269.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231611209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115805634 + 115805635.

It is an arithmetic number, because the mean of its divisors is an integer number (115805635).

Almost surely, 2^231611269 is an apocalyptic number.

It is an amenable number.

231611269 is a deficient number, since it is larger than the sum of its proper divisors (1).

231611269 is an equidigital number, since it uses as much as digits as its factorization.

231611269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 231611269 is about 15218.7801416539. The cubic root of 231611269 is about 614.1199822468.

The spelling of 231611269 in words is "two hundred thirty-one million, six hundred eleven thousand, two hundred sixty-nine".