220829 has 4 divisors (see below), whose sum is σ = 252384. Its totient is φ = 189276.

The previous prime is 220811. The next prime is 220841. The reversal of 220829 is 928022.

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 an emirpimes, since its reverse is a distinct semiprime: 928022 = 2 ⋅464011.

It is a cyclic number.

It is not a de Polignac number, because 220829 - 2⁸ = 220573 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 220829.

It is not an unprimeable number, because it can be changed into a prime (220859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15767 + ... + 15780.

It is an arithmetic number, because the mean of its divisors is an integer number (63096).

2²²⁰⁸²⁹ is an apocalyptic number.

It is an amenable number.

220829 is a deficient number, since it is larger than the sum of its proper divisors (31555).

220829 is an equidigital number, since it uses as much as digits as its factorization.

220829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31554.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 220829 is about 469.9244620149. The cubic root of 220829 is about 60.4438383263.

The spelling of 220829 in words is "two hundred twenty thousand, eight hundred twenty-nine".