2240222521 has 4 divisors (see below), whose sum is σ = 2262403044. Its totient is φ = 2218042000.

The previous prime is 2240222473. The next prime is 2240222527. The reversal of 2240222521 is 1252220422.

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 1599120121 + 641102400 = 39989^2 + 25320^2 .

It is a cyclic number.

It is not a de Polignac number, because 2240222521 - 2²¹ = 2238125369 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2240222492 and 2240222501.

It is not an unprimeable number, because it can be changed into a prime (2240222527) 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, 11090110 + ... + 11090311.

It is an arithmetic number, because the mean of its divisors is an integer number (565600761).

Almost surely, 2^2240222521 is an apocalyptic number.

It is an amenable number.

2240222521 is a deficient number, since it is larger than the sum of its proper divisors (22180523).

2240222521 is a wasteful number, since it uses less digits than its factorization.

2240222521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22180522.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2240222521 is about 47330.9890135416. The cubic root of 2240222521 is about 1308.4698488877.

Adding to 2240222521 its reverse (1252220422), we get a palindrome (3492442943).

The spelling of 2240222521 in words is "two billion, two hundred forty million, two hundred twenty-two thousand, five hundred twenty-one".