40134431 has 2 divisors, whose sum is σ = 40134432. Its totient is φ = 40134430.

The previous prime is 40134421. The next prime is 40134439. The reversal of 40134431 is 13443104.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40134431 - 2¹⁰ = 40133407 is a prime.

It is a super-2 number, since 2×40134431² = 3221545103387522, which contains 22 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 (40134439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20067215 + 20067216.

It is an arithmetic number, because the mean of its divisors is an integer number (20067216).

Almost surely, 2^40134431 is an apocalyptic number.

40134431 is a deficient number, since it is larger than the sum of its proper divisors (1).

40134431 is an equidigital number, since it uses as much as digits as its factorization.

40134431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 40134431 is about 6335.1741096832. The cubic root of 40134431 is about 342.3778838990.

Adding to 40134431 its reverse (13443104), we get a palindrome (53577535).

The spelling of 40134431 in words is "forty million, one hundred thirty-four thousand, four hundred thirty-one".