231270257 has 2 divisors, whose sum is σ = 231270258. Its totient is φ = 231270256.

The previous prime is 231270251. The next prime is 231270271. The reversal of 231270257 is 752072132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215238241 + 16032016 = 14671^2 + 4004^2 .

It is a cyclic number.

It is not a de Polignac number, because 231270257 - 2⁸ = 231270001 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (231270251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115635128 + 115635129.

It is an arithmetic number, because the mean of its divisors is an integer number (115635129).

Almost surely, 2^231270257 is an apocalyptic number.

It is an amenable number.

231270257 is a deficient number, since it is larger than the sum of its proper divisors (1).

231270257 is an equidigital number, since it uses as much as digits as its factorization.

231270257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 231270257 is about 15207.5723572173. The cubic root of 231270257 is about 613.8184351054.

The spelling of 231270257 in words is "two hundred thirty-one million, two hundred seventy thousand, two hundred fifty-seven".