256228522 has 16 divisors (see below), whose sum is σ = 443947392. Its totient is φ = 109616320.

The previous prime is 256228519. The next prime is 256228523. The reversal of 256228522 is 225822652.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (256228523) 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, 342178 + ... + 342925.

It is an arithmetic number, because the mean of its divisors is an integer number (27746712).

Almost surely, 2^256228522 is an apocalyptic number.

256228522 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

256228522 is a deficient number, since it is larger than the sum of its proper divisors (187718870).

256228522 is a wasteful number, since it uses less digits than its factorization.

256228522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685133.

The product of its digits is 38400, while the sum is 34.

The square root of 256228522 is about 16007.1397195127. The cubic root of 256228522 is about 635.1493000461.

The spelling of 256228522 in words is "two hundred fifty-six million, two hundred twenty-eight thousand, five hundred twenty-two".