22553533 has 4 divisors (see below), whose sum is σ = 22572220. Its totient is φ = 22534848.

The previous prime is 22553497. The next prime is 22553537. The reversal of 22553533 is 33535522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33535522 = 2 ⋅16767761.

It can be written as a sum of positive squares in 2 ways, for example, as 19873764 + 2679769 = 4458^2 + 1637^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22553533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22553537) 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, 7398 + ... + 9991.

It is an arithmetic number, because the mean of its divisors is an integer number (5643055).

Almost surely, 2^22553533 is an apocalyptic number.

It is an amenable number.

22553533 is a deficient number, since it is larger than the sum of its proper divisors (18687).

22553533 is a wasteful number, since it uses less digits than its factorization.

22553533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18686.

The product of its digits is 13500, while the sum is 28.

The square root of 22553533 is about 4749.0560114616. The cubic root of 22553533 is about 282.5345268057.

The spelling of 22553533 in words is "twenty-two million, five hundred fifty-three thousand, five hundred thirty-three".