231025229 has 2 divisors, whose sum is σ = 231025230. Its totient is φ = 231025228.

The previous prime is 231025129. The next prime is 231025231. The reversal of 231025229 is 922520132.

231025229 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136352329 + 94672900 = 11677^2 + 9730^2 .

It is a cyclic number.

It is not a de Polignac number, because 231025229 - 2⁸ = 231024973 is a prime.

Together with 231025231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 231025198 and 231025207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231025259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115512614 + 115512615.

It is an arithmetic number, because the mean of its divisors is an integer number (115512615).

Almost surely, 2^231025229 is an apocalyptic number.

It is an amenable number.

231025229 is a deficient number, since it is larger than the sum of its proper divisors (1).

231025229 is an equidigital number, since it uses as much as digits as its factorization.

231025229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 231025229 is about 15199.5141040758. The cubic root of 231025229 is about 613.6015808020.

The spelling of 231025229 in words is "two hundred thirty-one million, twenty-five thousand, two hundred twenty-nine".