255844261 has 2 divisors, whose sum is σ = 255844262. Its totient is φ = 255844260.

The previous prime is 255844219. The next prime is 255844289. The reversal of 255844261 is 162448552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206928225 + 48916036 = 14385^2 + 6994^2 .

It is a cyclic number.

It is not a de Polignac number, because 255844261 - 2¹⁷ = 255713189 is a prime.

It is a super-2 number, since 2×255844261² = 130912571773272242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 255844261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255844661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127922130 + 127922131.

It is an arithmetic number, because the mean of its divisors is an integer number (127922131).

Almost surely, 2^255844261 is an apocalyptic number.

It is an amenable number.

255844261 is a deficient number, since it is larger than the sum of its proper divisors (1).

255844261 is an equidigital number, since it uses as much as digits as its factorization.

255844261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 37.

The square root of 255844261 is about 15995.1324158320. The cubic root of 255844261 is about 634.8316341196.

The spelling of 255844261 in words is "two hundred fifty-five million, eight hundred forty-four thousand, two hundred sixty-one".