235431257 has 2 divisors, whose sum is σ = 235431258. Its totient is φ = 235431256.

The previous prime is 235431253. The next prime is 235431263. The reversal of 235431257 is 752134532.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215619856 + 19811401 = 14684^2 + 4451^2 .

It is a cyclic number.

It is not a de Polignac number, because 235431257 - 2² = 235431253 is a prime.

It is not a weakly prime, because it can be changed into another prime (235431253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 117715628 + 117715629.

It is an arithmetic number, because the mean of its divisors is an integer number (117715629).

Almost surely, 2^235431257 is an apocalyptic number.

It is an amenable number.

235431257 is a deficient number, since it is larger than the sum of its proper divisors (1).

235431257 is an equidigital number, since it uses as much as digits as its factorization.

235431257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 32.

The square root of 235431257 is about 15343.7693217801. The cubic root of 235431257 is about 617.4778364635.

Adding to 235431257 its reverse (752134532), we get a palindrome (987565789).

The spelling of 235431257 in words is "two hundred thirty-five million, four hundred thirty-one thousand, two hundred fifty-seven".