256279537 has 4 divisors (see below), whose sum is σ = 256539136. Its totient is φ = 256019940.

The previous prime is 256279531. The next prime is 256279589. The reversal of 256279537 is 735972652.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256279537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256279531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128313 + ... + 130294.

It is an arithmetic number, because the mean of its divisors is an integer number (64134784).

Almost surely, 2^256279537 is an apocalyptic number.

It is an amenable number.

256279537 is a deficient number, since it is larger than the sum of its proper divisors (259599).

256279537 is an equidigital number, since it uses as much as digits as its factorization.

256279537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259598.

The product of its digits is 793800, while the sum is 46.

The square root of 256279537 is about 16008.7331478790. The cubic root of 256279537 is about 635.1914499092.

The spelling of 256279537 in words is "two hundred fifty-six million, two hundred seventy-nine thousand, five hundred thirty-seven".