40043111 has 2 divisors, whose sum is σ = 40043112. Its totient is φ = 40043110.

The previous prime is 40043063. The next prime is 40043117. The reversal of 40043111 is 11134004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40043111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40043117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20021555 + 20021556.

It is an arithmetic number, because the mean of its divisors is an integer number (20021556).

Almost surely, 2^40043111 is an apocalyptic number.

40043111 is a deficient number, since it is larger than the sum of its proper divisors (1).

40043111 is an equidigital number, since it uses as much as digits as its factorization.

40043111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 40043111 is about 6327.9626263119. The cubic root of 40043111 is about 342.1180098433.

Adding to 40043111 its reverse (11134004), we get a palindrome (51177115).

The spelling of 40043111 in words is "forty million, forty-three thousand, one hundred eleven".