257618113 has 4 divisors (see below), whose sum is σ = 258213508. Its totient is φ = 257022720.

The previous prime is 257618111. The next prime is 257618143. The reversal of 257618113 is 311816752.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 152596609 + 105021504 = 12353^2 + 10248^2 .

It is a cyclic number.

It is not a de Polignac number, because 257618113 - 2¹ = 257618111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257618111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297048 + ... + 297913.

It is an arithmetic number, because the mean of its divisors is an integer number (64553377).

Almost surely, 2^257618113 is an apocalyptic number.

It is an amenable number.

257618113 is a deficient number, since it is larger than the sum of its proper divisors (595395).

257618113 is an equidigital number, since it uses as much as digits as its factorization.

257618113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595394.

The product of its digits is 10080, while the sum is 34.

The square root of 257618113 is about 16050.4863789232. The cubic root of 257618113 is about 636.2954215086.

The spelling of 257618113 in words is "two hundred fifty-seven million, six hundred eighteen thousand, one hundred thirteen".