22013522 has 4 divisors (see below), whose sum is σ = 33020286. Its totient is φ = 11006760.

The previous prime is 22013491. The next prime is 22013539. The reversal of 22013522 is 22531022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22531022 = 2 ⋅11265511.

It can be written as a sum of positive squares in only one way, i.e., 21911761 + 101761 = 4681^2 + 319^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22013522.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5503379 + ... + 5503382.

Almost surely, 2^22013522 is an apocalyptic number.

22013522 is a deficient number, since it is larger than the sum of its proper divisors (11006764).

22013522 is a wasteful number, since it uses less digits than its factorization.

22013522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006763.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 22013522 is about 4691.8569884428. The cubic root of 22013522 is about 280.2613291501.

Adding to 22013522 its reverse (22531022), we get a palindrome (44544544).

The spelling of 22013522 in words is "twenty-two million, thirteen thousand, five hundred twenty-two".