220256293 has 2 divisors, whose sum is σ = 220256294. Its totient is φ = 220256292.

The previous prime is 220256291. The next prime is 220256317. The reversal of 220256293 is 392652022.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185422689 + 34833604 = 13617^2 + 5902^2 .

It is a cyclic number.

It is not a de Polignac number, because 220256293 - 2¹ = 220256291 is a prime.

It is a super-2 number, since 2×220256293² = 97025669212203698, which contains 22 as substring.

Together with 220256291, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220256291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110128146 + 110128147.

It is an arithmetic number, because the mean of its divisors is an integer number (110128147).

Almost surely, 2^220256293 is an apocalyptic number.

It is an amenable number.

220256293 is a deficient number, since it is larger than the sum of its proper divisors (1).

220256293 is an equidigital number, since it uses as much as digits as its factorization.

220256293 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 220256293 is about 14841.0340946984. The cubic root of 220256293 is about 603.9154057878.

The spelling of 220256293 in words is "two hundred twenty million, two hundred fifty-six thousand, two hundred ninety-three".