256722067 has 16 divisors (see below), whose sum is σ = 316035072. Its totient is φ = 203686560.

The previous prime is 256722031. The next prime is 256722073. The reversal of 256722067 is 760227652.

256722067 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256722067 - 2¹⁵ = 256689299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256722077) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20728 + ... + 30709.

It is an arithmetic number, because the mean of its divisors is an integer number (19752192).

Almost surely, 2^256722067 is an apocalyptic number.

256722067 is a deficient number, since it is larger than the sum of its proper divisors (59313005).

256722067 is a wasteful number, since it uses less digits than its factorization.

256722067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51498.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 256722067 is about 16022.5487048721. The cubic root of 256722067 is about 635.5568447165.

The spelling of 256722067 in words is "two hundred fifty-six million, seven hundred twenty-two thousand, sixty-seven".