2221513 has 6 divisors (see below), whose sum is σ = 2584266. Its totient is φ = 1904112.

The previous prime is 2221511. The next prime is 2221523. The reversal of 2221513 is 3151222.

2221513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2039184 + 182329 = 1428^2 + 427^2 .

It is not a de Polignac number, because 2221513 - 2¹ = 2221511 is a prime.

It is a Duffinian number.

2221513 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2221511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22620 + ... + 22717.

It is an arithmetic number, because the mean of its divisors is an integer number (430711).

2^2221513 is an apocalyptic number.

It is an amenable number.

2221513 is a deficient number, since it is larger than the sum of its proper divisors (362753).

2221513 is an equidigital number, since it uses as much as digits as its factorization.

2221513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45351 (or 45344 counting only the distinct ones).

The product of its digits is 120, while the sum is 16.

The square root of 2221513 is about 1490.4740856519. The cubic root of 2221513 is about 130.4817040062.

Adding to 2221513 its reverse (3151222), we get a palindrome (5372735).

The spelling of 2221513 in words is "two million, two hundred twenty-one thousand, five hundred thirteen".