256224071 has 8 divisors (see below), whose sum is σ = 270587520. Its totient is φ = 242129272.

The previous prime is 256224043. The next prime is 256224103. The reversal of 256224071 is 170422652.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256224071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256224271) 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, 65201 + ... + 69018.

It is an arithmetic number, because the mean of its divisors is an integer number (33823440).

Almost surely, 2^256224071 is an apocalyptic number.

256224071 is a deficient number, since it is larger than the sum of its proper divisors (14363449).

256224071 is a wasteful number, since it uses less digits than its factorization.

256224071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134325.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 256224071 is about 16007.0006871993. Note that the first 3 decimals coincide. The cubic root of 256224071 is about 635.1456222537.

The spelling of 256224071 in words is "two hundred fifty-six million, two hundred twenty-four thousand, seventy-one".