40216493 has 2 divisors, whose sum is σ = 40216494. Its totient is φ = 40216492.

The previous prime is 40216469. The next prime is 40216513. The reversal of 40216493 is 39461204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39778249 + 438244 = 6307^2 + 662^2 .

It is a cyclic number.

It is not a de Polignac number, because 40216493 - 2¹² = 40212397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40216403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20108246 + 20108247.

It is an arithmetic number, because the mean of its divisors is an integer number (20108247).

Almost surely, 2^40216493 is an apocalyptic number.

It is an amenable number.

40216493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40216493 is an equidigital number, since it uses as much as digits as its factorization.

40216493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 40216493 is about 6341.6474988760. The cubic root of 40216493 is about 342.6110759131.

Adding to 40216493 its reverse (39461204), we get a palindrome (79677697).

The spelling of 40216493 in words is "forty million, two hundred sixteen thousand, four hundred ninety-three".