22210661 has 8 divisors (see below), whose sum is σ = 24793824. Its totient is φ = 19721520.

The previous prime is 22210651. The next prime is 22210667. The reversal of 22210661 is 16601222.

It is a happy number.

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

It is not a de Polignac number, because 22210661 - 2⁶ = 22210597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22210667) 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, 23006 + ... + 23951.

It is an arithmetic number, because the mean of its divisors is an integer number (3099228).

Almost surely, 2^22210661 is an apocalyptic number.

It is an amenable number.

22210661 is a deficient number, since it is larger than the sum of its proper divisors (2583163).

22210661 is a wasteful number, since it uses less digits than its factorization.

22210661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47011.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 22210661 is about 4712.8187955830. The cubic root of 22210661 is about 281.0954577473.

Adding to 22210661 its reverse (16601222), we get a palindrome (38811883).

The spelling of 22210661 in words is "twenty-two million, two hundred ten thousand, six hundred sixty-one".