2220469 has 4 divisors (see below), whose sum is σ = 2226796. Its totient is φ = 2214144.

The previous prime is 2220467. The next prime is 2220479. The reversal of 2220469 is 9640222.

2220469 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 438244 + 1782225 = 662^2 + 1335^2 .

It is a 4-Lehmer number, since φ(2220469) divides (2220469-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 2220469 - 2¹ = 2220467 is a prime.

It is a super-2 number, since 2×2220469² = 9860965159922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2604 + ... + 3349.

It is an arithmetic number, because the mean of its divisors is an integer number (556699).

2^2220469 is an apocalyptic number.

It is an amenable number.

2220469 is a deficient number, since it is larger than the sum of its proper divisors (6327).

2220469 is an equidigital number, since it uses as much as digits as its factorization.

2220469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6326.

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

The square root of 2220469 is about 1490.1238203586. The cubic root of 2220469 is about 130.4612608452.

The spelling of 2220469 in words is "two million, two hundred twenty thousand, four hundred sixty-nine".