40563191 has 6 divisors (see below), whose sum is σ = 42404040. Its totient is φ = 38799068.

The previous prime is 40563181. The next prime is 40563197. The reversal of 40563191 is 19136504.

It is not a de Polignac number, because 40563191 - 2¹⁸ = 40301047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40563197) 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 in 5 ways as a sum of consecutive naturals, for example, 37811 + ... + 38868.

It is an arithmetic number, because the mean of its divisors is an integer number (7067340).

Almost surely, 2^40563191 is an apocalyptic number.

40563191 is a deficient number, since it is larger than the sum of its proper divisors (1840849).

40563191 is an equidigital number, since it uses as much as digits as its factorization.

40563191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76725 (or 76702 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 40563191 is about 6368.9238494427. The cubic root of 40563191 is about 343.5927864677.

Adding to 40563191 its reverse (19136504), we get a palindrome (59699695).

The spelling of 40563191 in words is "forty million, five hundred sixty-three thousand, one hundred ninety-one".