220221439 has 4 divisors (see below), whose sum is σ = 220261624. Its totient is φ = 220181256.

The previous prime is 220221431. The next prime is 220221467. The reversal of 220221439 is 934122022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 934122022 = 2 ⋅467061011.

It is a cyclic number.

It is not a de Polignac number, because 220221439 - 2³ = 220221431 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10272 + ... + 23365.

It is an arithmetic number, because the mean of its divisors is an integer number (55065406).

Almost surely, 2^220221439 is an apocalyptic number.

220221439 is a deficient number, since it is larger than the sum of its proper divisors (40185).

220221439 is an equidigital number, since it uses as much as digits as its factorization.

220221439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40184.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 220221439 is about 14839.8598039200. The cubic root of 220221439 is about 603.8835489940.

The spelling of 220221439 in words is "two hundred twenty million, two hundred twenty-one thousand, four hundred thirty-nine".