256216250 has 20 divisors (see below), whose sum is σ = 480254082. Its totient is φ = 102486000.

The previous prime is 256216249. The next prime is 256216253. The reversal of 256216250 is 52612652.

It can be written as a sum of positive squares in 5 ways, for example, as 1079521 + 255136729 = 1039^2 + 15973^2 .

It is not an unprimeable number, because it can be changed into a prime (256216253) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 101237 + ... + 103736.

Almost surely, 2^256216250 is an apocalyptic number.

256216250 is a deficient number, since it is larger than the sum of its proper divisors (224037832).

256216250 is an equidigital number, since it uses as much as digits as its factorization.

256216250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204995 (or 204980 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 256216250 is about 16006.7563859765. The cubic root of 256216250 is about 635.1391597794.

The spelling of 256216250 in words is "two hundred fifty-six million, two hundred sixteen thousand, two hundred fifty".