40502191 has 2 divisors, whose sum is σ = 40502192. Its totient is φ = 40502190.

The previous prime is 40502159. The next prime is 40502197. The reversal of 40502191 is 19120504.

40502191 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 is a cyclic number.

It is not a de Polignac number, because 40502191 - 2⁵ = 40502159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40502197) 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, 20251095 + 20251096.

It is an arithmetic number, because the mean of its divisors is an integer number (20251096).

Almost surely, 2^40502191 is an apocalyptic number.

40502191 is a deficient number, since it is larger than the sum of its proper divisors (1).

40502191 is an equidigital number, since it uses as much as digits as its factorization.

40502191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 40502191 is about 6364.1331695683. The cubic root of 40502191 is about 343.4204654171.

Adding to 40502191 its reverse (19120504), we get a palindrome (59622695).

It can be divided in two parts, 4050 and 2191, that added together give a square (6241 = 79²).

The spelling of 40502191 in words is "forty million, five hundred two thousand, one hundred ninety-one".