256601422 has 32 divisors (see below), whose sum is σ = 505140480. Its totient is φ = 94711680.

The previous prime is 256601419. The next prime is 256601431. The reversal of 256601422 is 224106652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40923 + ... + 46774.

It is an arithmetic number, because the mean of its divisors is an integer number (15785640).

Almost surely, 2^256601422 is an apocalyptic number.

256601422 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256601422 is a deficient number, since it is larger than the sum of its proper divisors (248539058).

256601422 is a wasteful number, since it uses less digits than its factorization.

256601422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87736.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 256601422 is about 16018.7834119823. The cubic root of 256601422 is about 635.4572704041.

The spelling of 256601422 in words is "two hundred fifty-six million, six hundred one thousand, four hundred twenty-two".