22322521 has 4 divisors (see below), whose sum is σ = 24039652. Its totient is φ = 20605392.

The previous prime is 22322519. The next prime is 22322527. The reversal of 22322521 is 12522322.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 978121 + 21344400 = 989^2 + 4620^2 .

It is a cyclic number.

It is not a de Polignac number, because 22322521 - 2¹ = 22322519 is a prime.

It is a super-3 number, since 3×22322521³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22322527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 858546 + ... + 858571.

It is an arithmetic number, because the mean of its divisors is an integer number (6009913).

Almost surely, 2^22322521 is an apocalyptic number.

It is an amenable number.

22322521 is a deficient number, since it is larger than the sum of its proper divisors (1717131).

22322521 is a wasteful number, since it uses less digits than its factorization.

22322521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717130.

The product of its digits is 480, while the sum is 19.

The square root of 22322521 is about 4724.6715229738. The cubic root of 22322521 is about 281.5665633253.

Adding to 22322521 its reverse (12522322), we get a palindrome (34844843).

It can be divided in two parts, 2232 and 2521, that added together give a triangular number (4753 = T₉₇).

The spelling of 22322521 in words is "twenty-two million, three hundred twenty-two thousand, five hundred twenty-one".