256513367 has 4 divisors (see below), whose sum is σ = 279832776. Its totient is φ = 233193960.

The previous prime is 256513349. The next prime is 256513373. The reversal of 256513367 is 763315652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 256513367 - 2¹⁰ = 256512343 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256513367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256513337) 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, 11659688 + ... + 11659709.

It is an arithmetic number, because the mean of its divisors is an integer number (69958194).

Almost surely, 2^256513367 is an apocalyptic number.

256513367 is a deficient number, since it is larger than the sum of its proper divisors (23319409).

256513367 is a wasteful number, since it uses less digits than its factorization.

256513367 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23319408.

The product of its digits is 113400, while the sum is 38.

The square root of 256513367 is about 16016.0346840284. The cubic root of 256513367 is about 635.3845745330.

The spelling of 256513367 in words is "two hundred fifty-six million, five hundred thirteen thousand, three hundred sixty-seven".