256214761 has 4 divisors (see below), whose sum is σ = 279507024. Its totient is φ = 232922500.

The previous prime is 256214759. The next prime is 256214771. The reversal of 256214761 is 167412652.

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 not a de Polignac number, because 256214761 - 2¹ = 256214759 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256214711) 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, 11646115 + ... + 11646136.

It is an arithmetic number, because the mean of its divisors is an integer number (69876756).

Almost surely, 2^256214761 is an apocalyptic number.

It is an amenable number.

256214761 is a deficient number, since it is larger than the sum of its proper divisors (23292263).

256214761 is a wasteful number, since it uses less digits than its factorization.

256214761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23292262.

The product of its digits is 20160, while the sum is 34.

The square root of 256214761 is about 16006.7098742996. The cubic root of 256214761 is about 635.1379294072.

The spelling of 256214761 in words is "two hundred fifty-six million, two hundred fourteen thousand, seven hundred sixty-one".