257266222 has 4 divisors (see below), whose sum is σ = 385899336. Its totient is φ = 128633110.

The previous prime is 257266211. The next prime is 257266223. The reversal of 257266222 is 222662752.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257266223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64316554 + ... + 64316557.

It is an arithmetic number, because the mean of its divisors is an integer number (96474834).

Almost surely, 2^257266222 is an apocalyptic number.

257266222 is a deficient number, since it is larger than the sum of its proper divisors (128633114).

257266222 is a wasteful number, since it uses less digits than its factorization.

257266222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128633113.

The product of its digits is 40320, while the sum is 34.

The square root of 257266222 is about 16039.5206287470. The cubic root of 257266222 is about 636.0055756140.

The spelling of 257266222 in words is "two hundred fifty-seven million, two hundred sixty-six thousand, two hundred twenty-two".