2228551 has 4 divisors (see below), whose sum is σ = 2399992. Its totient is φ = 2057112.

The previous prime is 2228549. The next prime is 2228573. The reversal of 2228551 is 1558222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1558222 = 2 ⋅779111.

It is a cyclic number.

It is not a de Polignac number, because 2228551 - 2¹ = 2228549 is a prime.

It is a d-powerful number, because it can be written as 2¹⁴ + 2¹⁵ + 2²¹ + 8⁴ + 5² + 5⁷ + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2228521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85701 + ... + 85726.

It is an arithmetic number, because the mean of its divisors is an integer number (599998).

2^2228551 is an apocalyptic number.

2228551 is a deficient number, since it is larger than the sum of its proper divisors (171441).

2228551 is a wasteful number, since it uses less digits than its factorization.

2228551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171440.

The product of its digits is 1600, while the sum is 25.

The square root of 2228551 is about 1492.8332123851. The cubic root of 2228551 is about 130.6193522584.

The spelling of 2228551 in words is "two million, two hundred twenty-eight thousand, five hundred fifty-one".