40230191 has 2 divisors, whose sum is σ = 40230192. Its totient is φ = 40230190.

The previous prime is 40230161. The next prime is 40230247. The reversal of 40230191 is 19103204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40230191 is a prime.

It is a super-3 number, since 3×40230191³ (a number of 24 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40230131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20115095 + 20115096.

It is an arithmetic number, because the mean of its divisors is an integer number (20115096).

Almost surely, 2^40230191 is an apocalyptic number.

40230191 is a deficient number, since it is larger than the sum of its proper divisors (1).

40230191 is an equidigital number, since it uses as much as digits as its factorization.

40230191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 40230191 is about 6342.7274101919. The cubic root of 40230191 is about 342.6499700204.

Adding to 40230191 its reverse (19103204), we get a palindrome (59333395).

The spelling of 40230191 in words is "forty million, two hundred thirty thousand, one hundred ninety-one".