22508109 has 12 divisors (see below), whose sum is σ = 35012796. Its totient is φ = 13851072.

The previous prime is 22508107. The next prime is 22508117. The reversal of 22508109 is 90180522.

It can be written as a sum of positive squares in 2 ways, for example, as 8468100 + 14040009 = 2910^2 + 3747^2 .

It is not a de Polignac number, because 22508109 - 2¹ = 22508107 is a prime.

It is a super-2 number, since 2×22508109² = 1013229941511762, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22508107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96072 + ... + 96305.

It is an arithmetic number, because the mean of its divisors is an integer number (2917733).

Almost surely, 2^22508109 is an apocalyptic number.

It is an amenable number.

22508109 is a deficient number, since it is larger than the sum of its proper divisors (12504687).

22508109 is a wasteful number, since it uses less digits than its factorization.

22508109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192396 (or 192393 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 22508109 is about 4744.2711769038. The cubic root of 22508109 is about 282.3447195293.

The spelling of 22508109 in words is "twenty-two million, five hundred eight thousand, one hundred nine".