40022861 has 2 divisors, whose sum is σ = 40022862. Its totient is φ = 40022860.

The previous prime is 40022839. The next prime is 40022869. The reversal of 40022861 is 16822004.

40022861 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39300361 + 722500 = 6269^2 + 850^2 .

It is a cyclic number.

It is not a de Polignac number, because 40022861 - 2¹⁸ = 39760717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40022869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20011430 + 20011431.

It is an arithmetic number, because the mean of its divisors is an integer number (20011431).

Almost surely, 2^40022861 is an apocalyptic number.

It is an amenable number.

40022861 is a deficient number, since it is larger than the sum of its proper divisors (1).

40022861 is an equidigital number, since it uses as much as digits as its factorization.

40022861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 40022861 is about 6326.3623829180. The cubic root of 40022861 is about 342.0603298606.

Adding to 40022861 its reverse (16822004), we get a palindrome (56844865).

The spelling of 40022861 in words is "forty million, twenty-two thousand, eight hundred sixty-one".