256133222 has 16 divisors (see below), whose sum is σ = 397135872. Its totient is φ = 123765960.

The previous prime is 256133209. The next prime is 256133231. The reversal of 256133222 is 222331652.

It is a junction number, because it is equal to n+sod(n) for n = 256133191 and 256133200.

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, 51113 + ... + 55899.

It is an arithmetic number, because the mean of its divisors is an integer number (24820992).

Almost surely, 2^256133222 is an apocalyptic number.

256133222 is a deficient number, since it is larger than the sum of its proper divisors (141002650).

256133222 is a wasteful number, since it uses less digits than its factorization.

256133222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683.

The product of its digits is 4320, while the sum is 26.

The square root of 256133222 is about 16004.1626460118. The cubic root of 256133222 is about 635.0705458235.

Adding to 256133222 its reverse (222331652), we get a palindrome (478464874).

The spelling of 256133222 in words is "two hundred fifty-six million, one hundred thirty-three thousand, two hundred twenty-two".