2220621 has 16 divisors (see below), whose sum is σ = 3226944. Its totient is φ = 1350144.

The previous prime is 2220553. The next prime is 2220643. The reversal of 2220621 is 1260222.

It is not a de Polignac number, because 2220621 - 2¹³ = 2212429 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2220621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3490 + ... + 4076.

It is an arithmetic number, because the mean of its divisors is an integer number (201684).

2^2220621 is an apocalyptic number.

It is an amenable number.

2220621 is a deficient number, since it is larger than the sum of its proper divisors (1006323).

2220621 is a wasteful number, since it uses less digits than its factorization.

2220621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 700.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 2220621 is about 1490.1748219588. The cubic root of 2220621 is about 130.4642376426.

Adding to 2220621 its reverse (1260222), we get a palindrome (3480843).

The spelling of 2220621 in words is "two million, two hundred twenty thousand, six hundred twenty-one".