40163191 has 2 divisors, whose sum is σ = 40163192. Its totient is φ = 40163190.

The previous prime is 40163183. The next prime is 40163237. The reversal of 40163191 is 19136104.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40163191 - 2³ = 40163183 is a prime.

It is a super-2 number, since 2×40163191² = 3226163822604962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40163111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20081595 + 20081596.

It is an arithmetic number, because the mean of its divisors is an integer number (20081596).

Almost surely, 2^40163191 is an apocalyptic number.

40163191 is a deficient number, since it is larger than the sum of its proper divisors (1).

40163191 is an equidigital number, since it uses as much as digits as its factorization.

40163191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 40163191 is about 6337.4435697685. The cubic root of 40163191 is about 342.4596460883.

Adding to 40163191 its reverse (19136104), we get a palindrome (59299295).

The spelling of 40163191 in words is "forty million, one hundred sixty-three thousand, one hundred ninety-one".