256136222 has 8 divisors (see below), whose sum is σ = 384403656. Its totient is φ = 128001672.

The previous prime is 256136219. The next prime is 256136261. The reversal of 256136222 is 222631652.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28253 + ... + 36200.

It is an arithmetic number, because the mean of its divisors is an integer number (48050457).

Almost surely, 2^256136222 is an apocalyptic number.

256136222 is a deficient number, since it is larger than the sum of its proper divisors (128267434).

256136222 is a wasteful number, since it uses less digits than its factorization.

256136222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66442.

The product of its digits is 8640, while the sum is 29.

The square root of 256136222 is about 16004.2563713532. The cubic root of 256136222 is about 635.0730252678.

Adding to 256136222 its reverse (222631652), we get a palindrome (478767874).

It can be divided in two parts, 2561 and 36222, that added together give a palindrome (38783).

The spelling of 256136222 in words is "two hundred fifty-six million, one hundred thirty-six thousand, two hundred twenty-two".