2220538 has 4 divisors (see below), whose sum is σ = 3330810. Its totient is φ = 1110268.

The previous prime is 2220529. The next prime is 2220539. The reversal of 2220538 is 8350222.

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

It can be written as a sum of positive squares in only one way, i.e., 1697809 + 522729 = 1303^2 + 723^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2220539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555133 + ... + 555136.

2^2220538 is an apocalyptic number.

2220538 is a deficient number, since it is larger than the sum of its proper divisors (1110272).

2220538 is a wasteful number, since it uses less digits than its factorization.

2220538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110271.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 2220538 is about 1490.1469726171. The cubic root of 2220538 is about 130.4626121714.

The spelling of 2220538 in words is "two million, two hundred twenty thousand, five hundred thirty-eight".