2221553 has 4 divisors (see below), whose sum is σ = 2293248. Its totient is φ = 2149860.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221553 is 3551222.

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: 3551222 = 2 ⋅1775611.

It is a cyclic number.

It is not a de Polignac number, because 2221553 - 2¹⁰ = 2220529 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2221523) 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, 35801 + ... + 35862.

It is an arithmetic number, because the mean of its divisors is an integer number (573312).

2^2221553 is an apocalyptic number.

It is an amenable number.

2221553 is a deficient number, since it is larger than the sum of its proper divisors (71695).

2221553 is an equidigital number, since it uses as much as digits as its factorization.

2221553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71694.

The product of its digits is 600, while the sum is 20.

The square root of 2221553 is about 1490.4875041408. The cubic root of 2221553 is about 130.4824871416.

Adding to 2221553 its reverse (3551222), we get a palindrome (5772775).

The spelling of 2221553 in words is "two million, two hundred twenty-one thousand, five hundred fifty-three".