256601222 has 16 divisors (see below), whose sum is σ = 402049440. Its totient is φ = 122670912.

The previous prime is 256601209. The next prime is 256601227. The reversal of 256601222 is 222106652.

It is a junction number, because it is equal to n+sod(n) for n = 256601191 and 256601200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256601227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15503 + ... + 27450.

It is an arithmetic number, because the mean of its divisors is an integer number (25128090).

Almost surely, 2^256601222 is an apocalyptic number.

256601222 is a deficient number, since it is larger than the sum of its proper divisors (145448218).

256601222 is a wasteful number, since it uses less digits than its factorization.

256601222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43087.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 256601222 is about 16018.7771693098. Note that the first 3 decimals coincide. The cubic root of 256601222 is about 635.4571053083.

Adding to 256601222 its reverse (222106652), we get a palindrome (478707874).

The spelling of 256601222 in words is "two hundred fifty-six million, six hundred one thousand, two hundred twenty-two".