22245681 has 4 divisors (see below), whose sum is σ = 29660912. Its totient is φ = 14830452.

The previous prime is 22245679. The next prime is 22245703. The reversal of 22245681 is 18654222.

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 not a de Polignac number, because 22245681 - 2¹ = 22245679 is a prime.

It is a super-2 number, since 2×22245681² = 989740646307522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22245611) 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, 3707611 + ... + 3707616.

It is an arithmetic number, because the mean of its divisors is an integer number (7415228).

Almost surely, 2^22245681 is an apocalyptic number.

It is an amenable number.

22245681 is a deficient number, since it is larger than the sum of its proper divisors (7415231).

22245681 is an equidigital number, since it uses as much as digits as its factorization.

22245681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7415230.

The product of its digits is 7680, while the sum is 30.

The square root of 22245681 is about 4716.5327307250. The cubic root of 22245681 is about 281.2431164735.

The spelling of 22245681 in words is "twenty-two million, two hundred forty-five thousand, six hundred eighty-one".