40860221 has 2 divisors, whose sum is σ = 40860222. Its totient is φ = 40860220.

The previous prime is 40860181. The next prime is 40860229. The reversal of 40860221 is 12206804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26152996 + 14707225 = 5114^2 + 3835^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40860221 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 (40860229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20430110 + 20430111.

It is an arithmetic number, because the mean of its divisors is an integer number (20430111).

Almost surely, 2^40860221 is an apocalyptic number.

It is an amenable number.

40860221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40860221 is an equidigital number, since it uses as much as digits as its factorization.

40860221 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 40860221 is about 6392.2000125153. The cubic root of 40860221 is about 344.4294174236.

The spelling of 40860221 in words is "forty million, eight hundred sixty thousand, two hundred twenty-one".