22501365 has 16 divisors (see below), whose sum is σ = 36976128. Its totient is φ = 11676096.

The previous prime is 22501343. The next prime is 22501403. The reversal of 22501365 is 56310522.

It is not a de Polignac number, because 22501365 - 2¹⁹ = 21977077 is a prime.

It is a super-2 number, since 2×22501365² = 1012622853726450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19717 + ... + 20826.

It is an arithmetic number, because the mean of its divisors is an integer number (2311008).

Almost surely, 2^22501365 is an apocalyptic number.

It is an amenable number.

22501365 is a deficient number, since it is larger than the sum of its proper divisors (14474763).

22501365 is a wasteful number, since it uses less digits than its factorization.

22501365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40588.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 22501365 is about 4743.5603717039. The cubic root of 22501365 is about 282.3165175008.

Adding to 22501365 its reverse (56310522), we get a palindrome (78811887).

The spelling of 22501365 in words is "twenty-two million, five hundred one thousand, three hundred sixty-five".