40811819 has 2 divisors, whose sum is σ = 40811820. Its totient is φ = 40811818.

The previous prime is 40811809. The next prime is 40811861. The reversal of 40811819 is 91811804.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40811819 - 2⁴ = 40811803 is a prime.

It is a super-2 number, since 2×40811819² = 3331209140177522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40811809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20405909 + 20405910.

It is an arithmetic number, because the mean of its divisors is an integer number (20405910).

Almost surely, 2^40811819 is an apocalyptic number.

40811819 is a deficient number, since it is larger than the sum of its proper divisors (1).

40811819 is an equidigital number, since it uses as much as digits as its factorization.

40811819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 32.

The square root of 40811819 is about 6388.4128701893. The cubic root of 40811819 is about 344.2933628510.

The spelling of 40811819 in words is "forty million, eight hundred eleven thousand, eight hundred nineteen".