22501305 has 12 divisors (see below), whose sum is σ = 39002340. Its totient is φ = 12000672.

The previous prime is 22501273. The next prime is 22501321. The reversal of 22501305 is 50310522.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 15657849 + 6843456 = 3957^2 + 2616^2 .

It is not a de Polignac number, because 22501305 - 2⁵ = 22501273 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249970 + ... + 250059.

It is an arithmetic number, because the mean of its divisors is an integer number (3250195).

Almost surely, 2^22501305 is an apocalyptic number.

It is an amenable number.

22501305 is a deficient number, since it is larger than the sum of its proper divisors (16501035).

22501305 is a wasteful number, since it uses less digits than its factorization.

22501305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500040 (or 500037 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 22501305 is about 4743.5540473362. The cubic root of 22501305 is about 282.3162665678.

Adding to 22501305 its reverse (50310522), we get a palindrome (72811827).

The spelling of 22501305 in words is "twenty-two million, five hundred one thousand, three hundred five".