231415257 has 8 divisors (see below), whose sum is σ = 308671776. Its totient is φ = 154217792.

The previous prime is 231415241. The next prime is 231415267. The reversal of 231415257 is 752514132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231415257 - 2⁴ = 231415241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231415267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4623 + ... + 22004.

It is an arithmetic number, because the mean of its divisors is an integer number (38583972).

Almost surely, 2^231415257 is an apocalyptic number.

It is an amenable number.

231415257 is a deficient number, since it is larger than the sum of its proper divisors (77256519).

231415257 is a wasteful number, since it uses less digits than its factorization.

231415257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29527.

The product of its digits is 8400, while the sum is 30.

The square root of 231415257 is about 15212.3389720319. The cubic root of 231415257 is about 613.9466906505.

Adding to 231415257 its reverse (752514132), we get a palindrome (983929389).

It can be divided in two parts, 2314 and 15257, that added together give a palindrome (17571).

The spelling of 231415257 in words is "two hundred thirty-one million, four hundred fifteen thousand, two hundred fifty-seven".