22497081 has 4 divisors (see below), whose sum is σ = 29996112. Its totient is φ = 14998052.

The previous prime is 22497053. The next prime is 22497091. The reversal of 22497081 is 18079422.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22497081 - 2⁵ = 22497049 is a prime.

It is a super-2 number, since 2×22497081² = 1012237307041122, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22497091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3749511 + ... + 3749516.

It is an arithmetic number, because the mean of its divisors is an integer number (7499028).

Almost surely, 2^22497081 is an apocalyptic number.

It is an amenable number.

22497081 is a deficient number, since it is larger than the sum of its proper divisors (7499031).

22497081 is an equidigital number, since it uses as much as digits as its factorization.

22497081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7499030.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 22497081 is about 4743.1087906562. The cubic root of 22497081 is about 282.2985997622.

The spelling of 22497081 in words is "twenty-two million, four hundred ninety-seven thousand, eighty-one".