2212521 has 4 divisors (see below), whose sum is σ = 2950032. Its totient is φ = 1475012.

The previous prime is 2212519. The next prime is 2212523. The reversal of 2212521 is 1252122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2212519) and next prime (2212523).

It is a cyclic number.

It is not a de Polignac number, because 2212521 - 2¹ = 2212519 is a prime.

It is a D-number.

It is a self number, because there is not a number n which added to its sum of digits gives 2212521.

It is not an unprimeable number, because it can be changed into a prime (2212523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368751 + ... + 368756.

It is an arithmetic number, because the mean of its divisors is an integer number (737508).

2^2212521 is an apocalyptic number.

It is an amenable number.

2212521 is a deficient number, since it is larger than the sum of its proper divisors (737511).

2212521 is an equidigital number, since it uses as much as digits as its factorization.

2212521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737510.

The product of its digits is 80, while the sum is 15.

The square root of 2212521 is about 1487.4545371204. The cubic root of 2212521 is about 130.3054160300.

Adding to 2212521 its reverse (1252122), we get a palindrome (3464643).

The spelling of 2212521 in words is "two million, two hundred twelve thousand, five hundred twenty-one".