256432210 has 32 divisors (see below), whose sum is σ = 484075440. Its totient is φ = 97671168.

The previous prime is 256432193. The next prime is 256432219. The reversal of 256432210 is 12234652.

It can be written as a sum of positive squares in 8 ways, for example, as 96687889 + 159744321 = 9833^2 + 12639^2 .

It is not an unprimeable number, because it can be changed into a prime (256432219) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 15114 + ... + 27226.

Almost surely, 2^256432210 is an apocalyptic number.

256432210 is a deficient number, since it is larger than the sum of its proper divisors (227643230).

256432210 is a wasteful number, since it uses less digits than its factorization.

256432210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12222.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 256432210 is about 16013.5008664564. The cubic root of 256432210 is about 635.3175587336.

Adding to 256432210 its reverse (12234652), we get a palindrome (268666862).

The spelling of 256432210 in words is "two hundred fifty-six million, four hundred thirty-two thousand, two hundred ten".