40315213 has 4 divisors (see below), whose sum is σ = 40336668. Its totient is φ = 40293760.

The previous prime is 40315189. The next prime is 40315229. The reversal of 40315213 is 31251304.

40315213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 13410244 + 26904969 = 3662^2 + 5187^2 .

It is a cyclic number.

It is not a de Polignac number, because 40315213 - 2⁵ = 40315181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40315273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7606 + ... + 11767.

It is an arithmetic number, because the mean of its divisors is an integer number (10084167).

Almost surely, 2^40315213 is an apocalyptic number.

It is an amenable number.

40315213 is a deficient number, since it is larger than the sum of its proper divisors (21455).

40315213 is a wasteful number, since it uses less digits than its factorization.

40315213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21454.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 40315213 is about 6349.4261945470. The cubic root of 40315213 is about 342.8911842771.

Adding to 40315213 its reverse (31251304), we get a palindrome (71566517).

The spelling of 40315213 in words is "forty million, three hundred fifteen thousand, two hundred thirteen".