256556422 has 8 divisors (see below), whose sum is σ = 387139536. Its totient is φ = 127509912.

The previous prime is 256556407. The next prime is 256556431. The reversal of 256556422 is 224655652.

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, 383733 + ... + 384400.

It is an arithmetic number, because the mean of its divisors is an integer number (48392442).

Almost surely, 2^256556422 is an apocalyptic number.

256556422 is a deficient number, since it is larger than the sum of its proper divisors (130583114).

256556422 is a wasteful number, since it uses less digits than its factorization.

256556422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 768302.

The product of its digits is 144000, while the sum is 37.

The square root of 256556422 is about 16017.3787493460. The cubic root of 256556422 is about 635.4201216766.

The spelling of 256556422 in words is "two hundred fifty-six million, five hundred fifty-six thousand, four hundred twenty-two".