256231219 has 2 divisors, whose sum is σ = 256231220. Its totient is φ = 256231218.

The previous prime is 256231193. The next prime is 256231271. The reversal of 256231219 is 912132652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256231219 - 2⁵ = 256231187 is a prime.

It is a super-2 number, since 2×256231219² = 131308875180451922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256231289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128115609 + 128115610.

It is an arithmetic number, because the mean of its divisors is an integer number (128115610).

Almost surely, 2^256231219 is an apocalyptic number.

256231219 is a deficient number, since it is larger than the sum of its proper divisors (1).

256231219 is an equidigital number, since it uses as much as digits as its factorization.

256231219 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6480, while the sum is 31.

The square root of 256231219 is about 16007.2239629487. The cubic root of 256231219 is about 635.1515285147.

The spelling of 256231219 in words is "two hundred fifty-six million, two hundred thirty-one thousand, two hundred nineteen".