215630413 has 4 divisors (see below), whose sum is σ = 221458300. Its totient is φ = 209802528.

The previous prime is 215630377. The next prime is 215630417. The reversal of 215630413 is 314036512.

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 142134084 + 73496329 = 11922^2 + 8573^2 .

It is a cyclic number.

It is not a de Polignac number, because 215630413 - 2⁹ = 215629901 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 (215630417) 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, 2913888 + ... + 2913961.

It is an arithmetic number, because the mean of its divisors is an integer number (55364575).

Almost surely, 2^215630413 is an apocalyptic number.

It is an amenable number.

215630413 is a deficient number, since it is larger than the sum of its proper divisors (5827887).

215630413 is an equidigital number, since it uses as much as digits as its factorization.

215630413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5827886.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 215630413 is about 14684.3594684957. The cubic root of 215630413 is about 599.6575944494.

Adding to 215630413 its reverse (314036512), we get a palindrome (529666925).

The spelling of 215630413 in words is "two hundred fifteen million, six hundred thirty thousand, four hundred thirteen".