220388849 has 2 divisors, whose sum is σ = 220388850. Its totient is φ = 220388848.

The previous prime is 220388837. The next prime is 220388891. The reversal of 220388849 is 948883022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 218448400 + 1940449 = 14780^2 + 1393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220388849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (220388149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110194424 + 110194425.

It is an arithmetic number, because the mean of its divisors is an integer number (110194425).

Almost surely, 2^220388849 is an apocalyptic number.

It is an amenable number.

220388849 is a deficient number, since it is larger than the sum of its proper divisors (1).

220388849 is an equidigital number, since it uses as much as digits as its factorization.

220388849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 221184, while the sum is 44.

The square root of 220388849 is about 14845.4992842949. The cubic root of 220388849 is about 604.0365321894.

The spelling of 220388849 in words is "two hundred twenty million, three hundred eighty-eight thousand, eight hundred forty-nine".