2221587 has 10 divisors (see below), whose sum is σ = 3318788. Its totient is φ = 1481004.

The previous prime is 2221567. The next prime is 2221589. The reversal of 2221587 is 7851222.

It is not a de Polignac number, because 2221587 - 2⁶ = 2221523 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2⁴ + 2¹¹ + 2²¹ + 1 + 5⁴ + 8⁴ + 7⁶ .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2221587.

It is not an unprimeable number, because it can be changed into a prime (2221589) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13633 + ... + 13794.

2^2221587 is an apocalyptic number.

2221587 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2221587 is a deficient number, since it is larger than the sum of its proper divisors (1097201).

2221587 is an equidigital number, since it uses as much as digits as its factorization.

2221587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27439 (or 27430 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 2221587 is about 1490.4989097614. The cubic root of 2221587 is about 130.4831527994.

It can be divided in two parts, 22 and 21587, that added together give a square (21609 = 147²).

The spelling of 2221587 in words is "two million, two hundred twenty-one thousand, five hundred eighty-seven".