256222747 has 8 divisors (see below), whose sum is σ = 280966320. Its totient is φ = 231720960.

The previous prime is 256222727. The next prime is 256222873. The reversal of 256222747 is 747222652.

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

It is a cyclic number.

It is not a de Polignac number, because 256222747 - 2¹⁹ = 255698459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256222717) 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, 58222 + ... + 62467.

It is an arithmetic number, because the mean of its divisors is an integer number (35120790).

Almost surely, 2^256222747 is an apocalyptic number.

256222747 is a deficient number, since it is larger than the sum of its proper divisors (24743573).

256222747 is a wasteful number, since it uses less digits than its factorization.

256222747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120893.

The product of its digits is 94080, while the sum is 37.

The square root of 256222747 is about 16006.9593302413. The cubic root of 256222747 is about 635.1445282448.

The spelling of 256222747 in words is "two hundred fifty-six million, two hundred twenty-two thousand, seven hundred forty-seven".