22261761 has 6 divisors (see below), whose sum is σ = 32155890. Its totient is φ = 14841168.

The previous prime is 22261741. The next prime is 22261783. The reversal of 22261761 is 16716222.

It can be written as a sum of positive squares in only one way, i.e., 11861136 + 10400625 = 3444^2 + 3225^2 .

It is not a de Polignac number, because 22261761 - 2⁶ = 22261697 is a prime.

It is a super-2 number, since 2×22261761² = 991172005642242, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22261741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1236756 + ... + 1236773.

It is an arithmetic number, because the mean of its divisors is an integer number (5359315).

Almost surely, 2^22261761 is an apocalyptic number.

It is an amenable number.

22261761 is a deficient number, since it is larger than the sum of its proper divisors (9894129).

22261761 is a wasteful number, since it uses less digits than its factorization.

22261761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2473535 (or 2473532 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 22261761 is about 4718.2370648368. The cubic root of 22261761 is about 281.3108644572.

Adding to 22261761 its reverse (16716222), we get a palindrome (38977983).

The spelling of 22261761 in words is "twenty-two million, two hundred sixty-one thousand, seven hundred sixty-one".