22507065 has 80 divisors (see below), whose sum is σ = 48926592. Its totient is φ = 9662976.

The previous prime is 22507061. The next prime is 22507117. The reversal of 22507065 is 56070522.

It is not a de Polignac number, because 22507065 - 2² = 22507061 is a prime.

It is a super-4 number, since 4×22507065⁴ (a number of 31 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (22507061) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 47962 + ... + 48428.

Almost surely, 2^22507065 is an apocalyptic number.

It is an amenable number.

22507065 is an abundant number, since it is smaller than the sum of its proper divisors (26419527).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22507065 is a wasteful number, since it uses less digits than its factorization.

22507065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508 (or 499 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 22507065 is about 4744.1611481905. The cubic root of 22507065 is about 282.3403541034.

Adding to 22507065 its reverse (56070522), we get a palindrome (78577587).

The spelling of 22507065 in words is "twenty-two million, five hundred seven thousand, sixty-five".