256938222 has 16 divisors (see below), whose sum is σ = 522301392. Its totient is φ = 84241920.

The previous prime is 256938217. The next prime is 256938239. The reversal of 256938222 is 222839652.

256938222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 350643 + ... + 351374.

It is an arithmetic number, because the mean of its divisors is an integer number (32643837).

Almost surely, 2^256938222 is an apocalyptic number.

256938222 is an abundant number, since it is smaller than the sum of its proper divisors (265363170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256938222 is a wasteful number, since it uses less digits than its factorization.

256938222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702083.

The product of its digits is 103680, while the sum is 39.

The square root of 256938222 is about 16029.2926231946. The cubic root of 256938222 is about 635.7351701882.

The spelling of 256938222 in words is "two hundred fifty-six million, nine hundred thirty-eight thousand, two hundred twenty-two".