220199781 has 8 divisors (see below), whose sum is σ = 297316480. Its totient is φ = 144941472.

The previous prime is 220199779. The next prime is 220199821. The reversal of 220199781 is 187991022.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 220199781 - 2¹ = 220199779 is a prime.

It is a super-2 number, since 2×220199781² = 96975887104895922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220199701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 464320 + ... + 464793.

It is an arithmetic number, because the mean of its divisors is an integer number (37164560).

Almost surely, 2^220199781 is an apocalyptic number.

It is an amenable number.

220199781 is a deficient number, since it is larger than the sum of its proper divisors (77116699).

220199781 is an equidigital number, since it uses as much as digits as its factorization.

220199781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929195.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 220199781 is about 14839.1300621027. The cubic root of 220199781 is about 603.8637517409.

The spelling of 220199781 in words is "two hundred twenty million, one hundred ninety-nine thousand, seven hundred eighty-one".