257423222 has 32 divisors (see below), whose sum is σ = 461721600. Its totient is φ = 105244128.

The previous prime is 257423219. The next prime is 257423281. The reversal of 257423222 is 222324752.

It is a super-2 number, since 2×257423222² = 132533430449722568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153404 + ... + 155072.

It is an arithmetic number, because the mean of its divisors is an integer number (14428800).

Almost surely, 2^257423222 is an apocalyptic number.

257423222 is a deficient number, since it is larger than the sum of its proper divisors (204298378).

257423222 is a wasteful number, since it uses less digits than its factorization.

257423222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180.

The product of its digits is 13440, while the sum is 29.

The square root of 257423222 is about 16044.4140435231. The cubic root of 257423222 is about 636.1349261487.

Adding to 257423222 its reverse (222324752), we get a palindrome (479747974).

It can be divided in two parts, 25 and 7423222, that added together give a palindrome (7423247).

The spelling of 257423222 in words is "two hundred fifty-seven million, four hundred twenty-three thousand, two hundred twenty-two".