256822141 has 2 divisors, whose sum is σ = 256822142. Its totient is φ = 256822140.

The previous prime is 256822129. The next prime is 256822193. The reversal of 256822141 is 141228652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236083225 + 20738916 = 15365^2 + 4554^2 .

It is a cyclic number.

It is not a de Polignac number, because 256822141 - 2¹⁵ = 256789373 is a prime.

It is a super-2 number, since 2×256822141² = 131915224215647762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256822441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128411070 + 128411071.

It is an arithmetic number, because the mean of its divisors is an integer number (128411071).

Almost surely, 2^256822141 is an apocalyptic number.

It is an amenable number.

256822141 is a deficient number, since it is larger than the sum of its proper divisors (1).

256822141 is an equidigital number, since it uses as much as digits as its factorization.

256822141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7680, while the sum is 31.

The square root of 256822141 is about 16025.6713119919. The cubic root of 256822141 is about 635.6394170924.

The spelling of 256822141 in words is "two hundred fifty-six million, eight hundred twenty-two thousand, one hundred forty-one".