22130881 has 2 divisors, whose sum is σ = 22130882. Its totient is φ = 22130880.

The previous prime is 22130879. The next prime is 22130887. The reversal of 22130881 is 18803122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15800625 + 6330256 = 3975^2 + 2516^2 .

It is a cyclic number.

It is not a de Polignac number, because 22130881 - 2¹ = 22130879 is a prime.

It is a super-2 number, since 2×22130881² = 979551787672322, which contains 22 as substring.

Together with 22130879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (22130887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11065440 + 11065441.

It is an arithmetic number, because the mean of its divisors is an integer number (11065441).

Almost surely, 2^22130881 is an apocalyptic number.

It is an amenable number.

22130881 is a deficient number, since it is larger than the sum of its proper divisors (1).

22130881 is an equidigital number, since it uses as much as digits as its factorization.

22130881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 22130881 is about 4704.3470322671. The cubic root of 22130881 is about 280.7584919355.

The spelling of 22130881 in words is "twenty-two million, one hundred thirty thousand, eight hundred eighty-one".