22555501 has 4 divisors (see below), whose sum is σ = 22626972. Its totient is φ = 22484032.

The previous prime is 22555487. The next prime is 22555529. The reversal of 22555501 is 10555522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10555522 = 2 ⋅5277761.

It can be written as a sum of positive squares in 2 ways, for example, as 1155625 + 21399876 = 1075^2 + 4626^2 .

It is a cyclic number.

It is not a de Polignac number, because 22555501 - 2¹⁷ = 22424429 is a prime.

It is a super-2 number, since 2×22555501² = 1017501250722002, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22555531) 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, 35260 + ... + 35893.

It is an arithmetic number, because the mean of its divisors is an integer number (5656743).

Almost surely, 2^22555501 is an apocalyptic number.

It is an amenable number.

22555501 is a deficient number, since it is larger than the sum of its proper divisors (71471).

22555501 is an equidigital number, since it uses as much as digits as its factorization.

22555501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71470.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 22555501 is about 4749.2632060142. The cubic root of 22555501 is about 282.5427444654.

Subtracting from 22555501 its product of nonzero digits (2500), we obtain a square (22553001 = 4749²).

The spelling of 22555501 in words is "twenty-two million, five hundred fifty-five thousand, five hundred one".