22353661 has 12 divisors (see below), whose sum is σ = 25239676. Its totient is φ = 19768320.

The previous prime is 22353659. The next prime is 22353673. The reversal of 22353661 is 16635322.

It can be written as a sum of positive squares in 2 ways, for example, as 14485636 + 7868025 = 3806^2 + 2805^2 .

It is not a de Polignac number, because 22353661 - 2¹ = 22353659 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22353641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1981 + ... + 6973.

Almost surely, 2^22353661 is an apocalyptic number.

It is an amenable number.

22353661 is a deficient number, since it is larger than the sum of its proper divisors (2886015).

22353661 is a wasteful number, since it uses less digits than its factorization.

22353661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5052 (or 5041 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 22353661 is about 4727.9658416702. The cubic root of 22353661 is about 281.6974312922.

Adding to 22353661 its reverse (16635322), we get a palindrome (38988983).

The spelling of 22353661 in words is "twenty-two million, three hundred fifty-three thousand, six hundred sixty-one".