215040313 has 4 divisors (see below), whose sum is σ = 215417488. Its totient is φ = 214663140.

The previous prime is 215040289. The next prime is 215040349. The reversal of 215040313 is 313040512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215040313 - 2⁹ = 215039801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215040373) 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, 187731 + ... + 188872.

It is an arithmetic number, because the mean of its divisors is an integer number (53854372).

Almost surely, 2^215040313 is an apocalyptic number.

It is an amenable number.

215040313 is a deficient number, since it is larger than the sum of its proper divisors (377175).

215040313 is an equidigital number, since it uses as much as digits as its factorization.

215040313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377174.

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

The square root of 215040313 is about 14664.2528960735. The cubic root of 215040313 is about 599.1100816541.

Adding to 215040313 its reverse (313040512), we get a palindrome (528080825).

The spelling of 215040313 in words is "two hundred fifteen million, forty thousand, three hundred thirteen".