22660261 has 8 divisors (see below), whose sum is σ = 24485720. Its totient is φ = 20846592.

The previous prime is 22660247. The next prime is 22660273. The reversal of 22660261 is 16206622.

It can be written as a sum of positive squares in 4 ways, for example, as 2356225 + 20304036 = 1535^2 + 4506^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-22660261 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22660061) 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, 1285 + ... + 6853.

It is an arithmetic number, because the mean of its divisors is an integer number (3060715).

Almost surely, 2^22660261 is an apocalyptic number.

It is an amenable number.

22660261 is a deficient number, since it is larger than the sum of its proper divisors (1825459).

22660261 is a wasteful number, since it uses less digits than its factorization.

22660261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5895.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 22660261 is about 4760.2795086003. The cubic root of 22660261 is about 282.9794963232.

Adding to 22660261 its reverse (16206622), we get a palindrome (38866883).

The spelling of 22660261 in words is "twenty-two million, six hundred sixty thousand, two hundred sixty-one".