40216313 has 4 divisors (see below), whose sum is σ = 40585380. Its totient is φ = 39847248.

The previous prime is 40216289. The next prime is 40216321. The reversal of 40216313 is 31361204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12475024 + 27741289 = 3532^2 + 5267^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40216313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40216333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184370 + ... + 184587.

It is an arithmetic number, because the mean of its divisors is an integer number (10146345).

Almost surely, 2^40216313 is an apocalyptic number.

It is an amenable number.

40216313 is a deficient number, since it is larger than the sum of its proper divisors (369067).

40216313 is a wasteful number, since it uses less digits than its factorization.

40216313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369066.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40216313 is about 6341.6333069644. The cubic root of 40216313 is about 342.6105647622.

Adding to 40216313 its reverse (31361204), we get a palindrome (71577517).

The spelling of 40216313 in words is "forty million, two hundred sixteen thousand, three hundred thirteen".