22215641 has 8 divisors (see below), whose sum is σ = 25428480. Its totient is φ = 19012608.

The previous prime is 22215629. The next prime is 22215667. The reversal of 22215641 is 14651222.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22215641 - 2²² = 18021337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22215671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3320 + ... + 7446.

It is an arithmetic number, because the mean of its divisors is an integer number (3178560).

Almost surely, 2^22215641 is an apocalyptic number.

It is an amenable number.

22215641 is a deficient number, since it is larger than the sum of its proper divisors (3212839).

22215641 is an equidigital number, since it uses as much as digits as its factorization.

22215641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4903.

The product of its digits is 960, while the sum is 23.

The square root of 22215641 is about 4713.3471121911. The cubic root of 22215641 is about 281.1164649380.

Adding to 22215641 its reverse (14651222), we get a palindrome (36866863).

The spelling of 22215641 in words is "twenty-two million, two hundred fifteen thousand, six hundred forty-one".