40235491 has 2 divisors, whose sum is σ = 40235492. Its totient is φ = 40235490.

The previous prime is 40235467. The next prime is 40235501. The reversal of 40235491 is 19453204.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40235491 is a prime.

It is a super-2 number, since 2×40235491² = 3237789472022162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40235291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20117745 + 20117746.

It is an arithmetic number, because the mean of its divisors is an integer number (20117746).

Almost surely, 2^40235491 is an apocalyptic number.

40235491 is a deficient number, since it is larger than the sum of its proper divisors (1).

40235491 is an equidigital number, since it uses as much as digits as its factorization.

40235491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 40235491 is about 6343.1451977706. The cubic root of 40235491 is about 342.6650164739.

Adding to 40235491 its reverse (19453204), we get a palindrome (59688695).

The spelling of 40235491 in words is "forty million, two hundred thirty-five thousand, four hundred ninety-one".