22505533 has 8 divisors (see below), whose sum is σ = 22867488. Its totient is φ = 22145904.

The previous prime is 22505521. The next prime is 22505551. The reversal of 22505533 is 33550522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22505533 - 2¹⁷ = 22374461 is a prime.

It is a super-2 number, since 2×22505533² = 1012998031228178, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22505498 and 22505507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22505513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32610 + ... + 33292.

It is an arithmetic number, because the mean of its divisors is an integer number (2858436).

Almost surely, 2^22505533 is an apocalyptic number.

It is an amenable number.

22505533 is a deficient number, since it is larger than the sum of its proper divisors (361955).

22505533 is an equidigital number, since it uses as much as digits as its factorization.

22505533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163.

The product of its (nonzero) digits is 4500, while the sum is 25.

The square root of 22505533 is about 4743.9996838111. Note that the first 3 decimals coincide. The cubic root of 22505533 is about 282.3339478892. Note that the first 3 decimals are identical.

The spelling of 22505533 in words is "twenty-two million, five hundred five thousand, five hundred thirty-three".