2222521 has 4 divisors (see below), whose sum is σ = 2540032. Its totient is φ = 1905012.

The previous prime is 2222509. The next prime is 2222527. The reversal of 2222521 is 1252222.

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 a cyclic number.

It is not a de Polignac number, because 2222521 - 2¹⁷ = 2091449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2222495 and 2222504.

It is not an unprimeable number, because it can be changed into a prime (2222527) 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, 158745 + ... + 158758.

It is an arithmetic number, because the mean of its divisors is an integer number (635008).

2^2222521 is an apocalyptic number.

It is an amenable number.

2222521 is a deficient number, since it is larger than the sum of its proper divisors (317511).

2222521 is an equidigital number, since it uses as much as digits as its factorization.

2222521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317510.

The product of its digits is 160, while the sum is 16.

The square root of 2222521 is about 1490.8121947449. The cubic root of 2222521 is about 130.5014361541.

Adding to 2222521 its reverse (1252222), we get a palindrome (3474743).

Subtracting from 2222521 its reverse (1252222), we obtain a cube (970299 = 99³).

The spelling of 2222521 in words is "two million, two hundred twenty-two thousand, five hundred twenty-one".