256633204 has 6 divisors (see below), whose sum is σ = 449108114. Its totient is φ = 128316600.

The previous prime is 256633199. The next prime is 256633211. The reversal of 256633204 is 402336652.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 148888804 + 107744400 = 12202^2 + 10380^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32079147 + ... + 32079154.

Almost surely, 2^256633204 is an apocalyptic number.

It is an amenable number.

256633204 is a deficient number, since it is larger than the sum of its proper divisors (192474910).

256633204 is a wasteful number, since it uses less digits than its factorization.

256633204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64158305 (or 64158303 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 31.

The square root of 256633204 is about 16019.7754041684. The cubic root of 256633204 is about 635.4835046952.

Adding to 256633204 its reverse (402336652), we get a palindrome (658969856).

The spelling of 256633204 in words is "two hundred fifty-six million, six hundred thirty-three thousand, two hundred four".