220881229 has 4 divisors (see below), whose sum is σ = 220910976. Its totient is φ = 220851484.

The previous prime is 220881223. The next prime is 220881257. The reversal of 220881229 is 922188022.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 220881229 - 2⁹ = 220880717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220881194 and 220881203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220881223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6582 + ... + 22024.

It is an arithmetic number, because the mean of its divisors is an integer number (55227744).

Almost surely, 2^220881229 is an apocalyptic number.

It is an amenable number.

220881229 is a deficient number, since it is larger than the sum of its proper divisors (29747).

220881229 is a wasteful number, since it uses less digits than its factorization.

220881229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29746.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 220881229 is about 14862.0735094401. The cubic root of 220881229 is about 604.4860320833.

The spelling of 220881229 in words is "two hundred twenty million, eight hundred eighty-one thousand, two hundred twenty-nine".