256256067 has 8 divisors (see below), whose sum is σ = 342143824. Its totient is φ = 170602848.

The previous prime is 256256053. The next prime is 256256071. The reversal of 256256067 is 760652652.

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

It is not a de Polignac number, because 256256067 - 2⁴ = 256256051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256256017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56068 + ... + 60465.

It is an arithmetic number, because the mean of its divisors is an integer number (42767978).

Almost surely, 2^256256067 is an apocalyptic number.

256256067 is a deficient number, since it is larger than the sum of its proper divisors (85887757).

256256067 is a wasteful number, since it uses less digits than its factorization.

256256067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117269.

The product of its (nonzero) digits is 151200, while the sum is 39.

The square root of 256256067 is about 16008.0000937031. Note that the first 4 decimals coincide. The cubic root of 256256067 is about 635.1720591057.

The spelling of 256256067 in words is "two hundred fifty-six million, two hundred fifty-six thousand, sixty-seven".