220838447 has 2 divisors, whose sum is σ = 220838448. Its totient is φ = 220838446.

The previous prime is 220838399. The next prime is 220838467. The reversal of 220838447 is 744838022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220838447 - 2¹⁸ = 220576303 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220838447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220838467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110419223 + 110419224.

It is an arithmetic number, because the mean of its divisors is an integer number (110419224).

Almost surely, 2^220838447 is an apocalyptic number.

220838447 is a deficient number, since it is larger than the sum of its proper divisors (1).

220838447 is an equidigital number, since it uses as much as digits as its factorization.

220838447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 220838447 is about 14860.6341385555. The cubic root of 220838447 is about 604.4470023728.

The spelling of 220838447 in words is "two hundred twenty million, eight hundred thirty-eight thousand, four hundred forty-seven".