256417222 has 8 divisors (see below), whose sum is σ = 407250936. Its totient is φ = 120666912.

The previous prime is 256417211. The next prime is 256417237. The reversal of 256417222 is 222714652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3770808 + ... + 3770875.

It is an arithmetic number, because the mean of its divisors is an integer number (50906367).

Almost surely, 2^256417222 is an apocalyptic number.

256417222 is a deficient number, since it is larger than the sum of its proper divisors (150833714).

256417222 is a wasteful number, since it uses less digits than its factorization.

256417222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7541702.

The product of its digits is 13440, while the sum is 31.

The square root of 256417222 is about 16013.0328795016. The cubic root of 256417222 is about 635.3051807707.

The spelling of 256417222 in words is "two hundred fifty-six million, four hundred seventeen thousand, two hundred twenty-two".