22115641 has 4 divisors (see below), whose sum is σ = 22186612. Its totient is φ = 22044672.

The previous prime is 22115609. The next prime is 22115647. The reversal of 22115641 is 14651122.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9363600 + 12752041 = 3060^2 + 3571^2 .

It is a cyclic number.

It is not a de Polignac number, because 22115641 - 2⁵ = 22115609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22115647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35016 + ... + 35641.

It is an arithmetic number, because the mean of its divisors is an integer number (5546653).

Almost surely, 2^22115641 is an apocalyptic number.

It is an amenable number.

22115641 is a deficient number, since it is larger than the sum of its proper divisors (70971).

22115641 is an equidigital number, since it uses as much as digits as its factorization.

22115641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70970.

The product of its digits is 480, while the sum is 22.

The square root of 22115641 is about 4702.7269748519. The cubic root of 22115641 is about 280.6940308482.

Adding to 22115641 its reverse (14651122), we get a palindrome (36766763).

The spelling of 22115641 in words is "twenty-two million, one hundred fifteen thousand, six hundred forty-one".