2221554 has 16 divisors (see below), whose sum is σ = 4563648. Its totient is φ = 720432.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221554 is 4551222.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221554.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4782 + ... + 5225.

It is an arithmetic number, because the mean of its divisors is an integer number (285228).

2^2221554 is an apocalyptic number.

2221554 is an abundant number, since it is smaller than the sum of its proper divisors (2342094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221554 is a wasteful number, since it uses less digits than its factorization.

2221554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10049.

The product of its digits is 800, while the sum is 21.

The square root of 2221554 is about 1490.4878396015. The cubic root of 2221554 is about 130.4825067199.

Adding to 2221554 its reverse (4551222), we get a palindrome (6772776).

It can be divided in two parts, 2221 and 554, that added together give a triangular number (2775 = T₇₄).

The spelling of 2221554 in words is "two million, two hundred twenty-one thousand, five hundred fifty-four".