22131761 has 2 divisors, whose sum is σ = 22131762. Its totient is φ = 22131760.

The previous prime is 22131749. The next prime is 22131779. The reversal of 22131761 is 16713122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14868736 + 7263025 = 3856^2 + 2695^2 .

It is a cyclic number.

It is not a de Polignac number, because 22131761 - 2¹⁰ = 22130737 is a prime.

It is a super-2 number, since 2×22131761² = 979629689922242, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22131721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065880 + 11065881.

It is an arithmetic number, because the mean of its divisors is an integer number (11065881).

Almost surely, 2^22131761 is an apocalyptic number.

It is an amenable number.

22131761 is a deficient number, since it is larger than the sum of its proper divisors (1).

22131761 is an equidigital number, since it uses as much as digits as its factorization.

22131761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 23.

The square root of 22131761 is about 4704.4405618522. The cubic root of 22131761 is about 280.7622131941.

Adding to 22131761 its reverse (16713122), we get a palindrome (38844883).

The spelling of 22131761 in words is "twenty-two million, one hundred thirty-one thousand, seven hundred sixty-one".