256261211 has 4 divisors (see below), whose sum is σ = 257282424. Its totient is φ = 255240000.

The previous prime is 256261199. The next prime is 256261217. The reversal of 256261211 is 112162652.

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 256261211 - 2¹⁸ = 255999067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256261217) 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, 510230 + ... + 510731.

It is an arithmetic number, because the mean of its divisors is an integer number (64320606).

Almost surely, 2^256261211 is an apocalyptic number.

256261211 is a deficient number, since it is larger than the sum of its proper divisors (1021213).

256261211 is a wasteful number, since it uses less digits than its factorization.

256261211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1021212.

The product of its digits is 1440, while the sum is 26.

The square root of 256261211 is about 16008.1607625611. The cubic root of 256261211 is about 635.1763091556.

The spelling of 256261211 in words is "two hundred fifty-six million, two hundred sixty-one thousand, two hundred eleven".