256143000 has 64 divisors (see below), whose sum is σ = 799175520. Its totient is φ = 68304000.

The previous prime is 256142983. The next prime is 256143037. The reversal of 256143000 is 341652.

It is a happy number.

256143000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39691 + ... + 45690.

Almost surely, 2^256143000 is an apocalyptic number.

256143000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256143000 is an abundant number, since it is smaller than the sum of its proper divisors (543032520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256143000 is a wasteful number, since it uses less digits than its factorization.

256143000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85405 (or 85391 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 256143000 is about 16004.4681261203. The cubic root of 256143000 is about 635.0786270878.

Adding to 256143000 its reverse (341652), we get a palindrome (256484652).

The spelling of 256143000 in words is "two hundred fifty-six million, one hundred forty-three thousand".