256143166 has 8 divisors (see below), whose sum is σ = 384305400. Its totient is φ = 128041368.

The previous prime is 256143163. The next prime is 256143169. The reversal of 256143166 is 661341652.

It is an interprime number because it is at equal distance from previous prime (256143163) and next prime (256143169).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256143163) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2361 + ... + 22756.

It is an arithmetic number, because the mean of its divisors is an integer number (48038175).

Almost surely, 2^256143166 is an apocalyptic number.

256143166 is a deficient number, since it is larger than the sum of its proper divisors (128162234).

256143166 is a wasteful number, since it uses less digits than its factorization.

256143166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30218.

The product of its digits is 25920, while the sum is 34.

The square root of 256143166 is about 16004.4733121712. The cubic root of 256143166 is about 635.0787642807.

The spelling of 256143166 in words is "two hundred fifty-six million, one hundred forty-three thousand, one hundred sixty-six".