2221530 has 16 divisors (see below), whose sum is σ = 5331744. Its totient is φ = 592400.

The previous prime is 2221523. The next prime is 2221567. The reversal of 2221530 is 351222.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 36996 + ... + 37055.

It is an arithmetic number, because the mean of its divisors is an integer number (333234).

2^2221530 is an apocalyptic number.

2221530 is an abundant number, since it is smaller than the sum of its proper divisors (3110214).

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

2221530 is a wasteful number, since it uses less digits than its factorization.

2221530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74061.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 2221530 is about 1490.4797885245. The cubic root of 2221530 is about 130.4820368399.

Adding to 2221530 its reverse (351222), we get a palindrome (2572752).

The spelling of 2221530 in words is "two million, two hundred twenty-one thousand, five hundred thirty".