256924219 has 2 divisors, whose sum is σ = 256924220. Its totient is φ = 256924218.

The previous prime is 256924193. The next prime is 256924229. The reversal of 256924219 is 912429652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256924219 - 2⁹ = 256923707 is a prime.

It is a super-2 number, since 2×256924219² = 132020108617519922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256924229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128462109 + 128462110.

It is an arithmetic number, because the mean of its divisors is an integer number (128462110).

Almost surely, 2^256924219 is an apocalyptic number.

256924219 is a deficient number, since it is larger than the sum of its proper divisors (1).

256924219 is an equidigital number, since it uses as much as digits as its factorization.

256924219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 40.

The square root of 256924219 is about 16028.8558231709. The cubic root of 256924219 is about 635.7236208992.

The spelling of 256924219 in words is "two hundred fifty-six million, nine hundred twenty-four thousand, two hundred nineteen".