231235057 has 2 divisors, whose sum is σ = 231235058. Its totient is φ = 231235056.

The previous prime is 231235049. The next prime is 231235061. The reversal of 231235057 is 750532132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 231161616 + 73441 = 15204^2 + 271^2 .

It is a cyclic number.

It is not a de Polignac number, because 231235057 - 2³ = 231235049 is a prime.

It is equal to p_12706804 and since 231235057 and 12706804 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (231235007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115617528 + 115617529.

It is an arithmetic number, because the mean of its divisors is an integer number (115617529).

Almost surely, 2^231235057 is an apocalyptic number.

It is an amenable number.

231235057 is a deficient number, since it is larger than the sum of its proper divisors (1).

231235057 is an equidigital number, since it uses as much as digits as its factorization.

231235057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 231235057 is about 15206.4149949947. The cubic root of 231235057 is about 613.7872918800.

Adding to 231235057 its reverse (750532132), we get a palindrome (981767189).

The spelling of 231235057 in words is "two hundred thirty-one million, two hundred thirty-five thousand, fifty-seven".