256197250 has 32 divisors (see below), whose sum is σ = 492581232. Its totient is φ = 99705600.

The previous prime is 256197241. The next prime is 256197251. The reversal of 256197250 is 52791652.

256197250 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 1252161 + 254945089 = 1119^2 + 15967^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (256197251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4599 + ... + 23098.

Almost surely, 2^256197250 is an apocalyptic number.

256197250 is a deficient number, since it is larger than the sum of its proper divisors (236383982).

256197250 is a wasteful number, since it uses less digits than its factorization.

256197250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27751 (or 27741 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 256197250 is about 16006.1628755926. The cubic root of 256197250 is about 635.1234595752.

It can be divided in two parts, 256 and 197250, that added together give a triangular number (197506 = T₆₂₈).

The spelling of 256197250 in words is "two hundred fifty-six million, one hundred ninety-seven thousand, two hundred fifty".