40205563 has 2 divisors, whose sum is σ = 40205564. Its totient is φ = 40205562.

The previous prime is 40205551. The next prime is 40205573. The reversal of 40205563 is 36550204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40205563 is a prime.

It is a super-2 number, since 2×40205563² = 3232974592293938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40205573) 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, 20102781 + 20102782.

It is an arithmetic number, because the mean of its divisors is an integer number (20102782).

Almost surely, 2^40205563 is an apocalyptic number.

40205563 is a deficient number, since it is larger than the sum of its proper divisors (1).

40205563 is an equidigital number, since it uses as much as digits as its factorization.

40205563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 40205563 is about 6340.7856768700. The cubic root of 40205563 is about 342.5800349306.

Adding to 40205563 its reverse (36550204), we get a palindrome (76755767).

The spelling of 40205563 in words is "forty million, two hundred five thousand, five hundred sixty-three".