2221558 has 4 divisors (see below), whose sum is σ = 3332340. Its totient is φ = 1110778.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221558 is 8551222.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8551222 = 2 ⋅4275611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 555388 + ... + 555391.

It is an arithmetic number, because the mean of its divisors is an integer number (833085).

2^2221558 is an apocalyptic number.

2221558 is a deficient number, since it is larger than the sum of its proper divisors (1110782).

2221558 is a wasteful number, since it uses less digits than its factorization.

2221558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1110781.

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

The square root of 2221558 is about 1490.4891814435. The cubic root of 2221558 is about 130.4825850329.

The spelling of 2221558 in words is "two million, two hundred twenty-one thousand, five hundred fifty-eight".