2221536 has 48 divisors (see below), whose sum is σ = 5930064. Its totient is φ = 728064.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221536 is 6351222.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

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, 6850 + ... + 7166.

It is an arithmetic number, because the mean of its divisors is an integer number (123543).

2^2221536 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2965032).

2221536 is an abundant number, since it is smaller than the sum of its proper divisors (3708528).

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

2221536 is a wasteful number, since it uses less digits than its factorization.

2221536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 395 counting only the distinct ones).

The product of its digits is 720, while the sum is 21.

The square root of 2221536 is about 1490.4818012978. The cubic root of 2221536 is about 130.4821543102.

Adding to 2221536 its reverse (6351222), we get a palindrome (8572758).

The spelling of 2221536 in words is "two million, two hundred twenty-one thousand, five hundred thirty-six".