22545681 has 16 divisors (see below), whose sum is σ = 31549056. Its totient is φ = 14294016.

The previous prime is 22545641. The next prime is 22545709. The reversal of 22545681 is 18654522.

It is not a de Polignac number, because 22545681 - 2⁹ = 22545169 is a prime.

It is a super-2 number, since 2×22545681² = 1016615463507522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22545641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12471 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (1971816).

Almost surely, 2^22545681 is an apocalyptic number.

It is an amenable number.

22545681 is a deficient number, since it is larger than the sum of its proper divisors (9003375).

22545681 is a wasteful number, since it uses less digits than its factorization.

22545681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1912.

The product of its digits is 19200, while the sum is 33.

The square root of 22545681 is about 4748.2292488885. The cubic root of 22545681 is about 282.5017349203.

The spelling of 22545681 in words is "twenty-two million, five hundred forty-five thousand, six hundred eighty-one".