40221563 has 2 divisors, whose sum is σ = 40221564. Its totient is φ = 40221562.

The previous prime is 40221557. The next prime is 40221589. The reversal of 40221563 is 36512204.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40221563 - 2²² = 36027259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40221523) 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, 20110781 + 20110782.

It is an arithmetic number, because the mean of its divisors is an integer number (20110782).

Almost surely, 2^40221563 is an apocalyptic number.

40221563 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221563 is an equidigital number, since it uses as much as digits as its factorization.

40221563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40221563 is about 6342.0472246744. The cubic root of 40221563 is about 342.6254727027.

Adding to 40221563 its reverse (36512204), we get a palindrome (76733767).

The spelling of 40221563 in words is "forty million, two hundred twenty-one thousand, five hundred sixty-three".