40216523 has 2 divisors, whose sum is σ = 40216524. Its totient is φ = 40216522.

The previous prime is 40216513. The next prime is 40216529. The reversal of 40216523 is 32561204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40216523 - 2¹² = 40212427 is a prime.

It is not a weakly prime, because it can be changed into another prime (40216529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20108261 + 20108262.

It is an arithmetic number, because the mean of its divisors is an integer number (20108262).

Almost surely, 2^40216523 is an apocalyptic number.

40216523 is a deficient number, since it is larger than the sum of its proper divisors (1).

40216523 is an equidigital number, since it uses as much as digits as its factorization.

40216523 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 40216523 is about 6341.6498641915. The cubic root of 40216523 is about 342.6111611047.

Adding to 40216523 its reverse (32561204), we get a palindrome (72777727).

The spelling of 40216523 in words is "forty million, two hundred sixteen thousand, five hundred twenty-three".