22907881 has 2 divisors, whose sum is σ = 22907882. Its totient is φ = 22907880.

The previous prime is 22907869. The next prime is 22907887. The reversal of 22907881 is 18870922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17147881 + 5760000 = 4141^2 + 2400^2 .

It is a cyclic number.

It is not a de Polignac number, because 22907881 - 2¹¹ = 22905833 is a prime.

It is a super-2 number, since 2×22907881² = 1049542023820322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 22907881.

It is not a weakly prime, because it can be changed into another prime (22907887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11453940 + 11453941.

It is an arithmetic number, because the mean of its divisors is an integer number (11453941).

Almost surely, 2^22907881 is an apocalyptic number.

It is an amenable number.

22907881 is a deficient number, since it is larger than the sum of its proper divisors (1).

22907881 is an equidigital number, since it uses as much as digits as its factorization.

22907881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 22907881 is about 4786.2178178599. The cubic root of 22907881 is about 284.0065172412.

The spelling of 22907881 in words is "twenty-two million, nine hundred seven thousand, eight hundred eighty-one".