256181622 has 32 divisors (see below), whose sum is σ = 518794848. Its totient is φ = 84327936.

The previous prime is 256181593. The next prime is 256181623. The reversal of 256181622 is 226181652.

256181622 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256181623) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252388 + ... + 253400.

It is an arithmetic number, because the mean of its divisors is an integer number (16212339).

Almost surely, 2^256181622 is an apocalyptic number.

256181622 is an abundant number, since it is smaller than the sum of its proper divisors (262613226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256181622 is a wasteful number, since it uses less digits than its factorization.

256181622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504.

The product of its digits is 11520, while the sum is 33.

The square root of 256181622 is about 16005.6746811873. The cubic root of 256181622 is about 635.1105451622.

The spelling of 256181622 in words is "two hundred fifty-six million, one hundred eighty-one thousand, six hundred twenty-two".