257222117 has 8 divisors (see below), whose sum is σ = 264769536. Its totient is φ = 249761232.

The previous prime is 257222107. The next prime is 257222149. The reversal of 257222117 is 711222752.

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 257222117 - 2²⁴ = 240444901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 257222117.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257222107) 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, 15578 + ... + 27515.

It is an arithmetic number, because the mean of its divisors is an integer number (33096192).

Almost surely, 2^257222117 is an apocalyptic number.

It is an amenable number.

257222117 is a deficient number, since it is larger than the sum of its proper divisors (7547419).

257222117 is a wasteful number, since it uses less digits than its factorization.

257222117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43267.

The product of its digits is 3920, while the sum is 29.

The square root of 257222117 is about 16038.1456845859. The cubic root of 257222117 is about 635.9692285324.

Adding to 257222117 its reverse (711222752), we get a palindrome (968444869).

The spelling of 257222117 in words is "two hundred fifty-seven million, two hundred twenty-two thousand, one hundred seventeen".