215430213 has 16 divisors (see below), whose sum is σ = 305389440. Its totient is φ = 134781504.

The previous prime is 215430211. The next prime is 215430247. The reversal of 215430213 is 312034512.

215430213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 215430213 - 2¹ = 215430211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215430213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215430211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25798 + ... + 33111.

It is an arithmetic number, because the mean of its divisors is an integer number (19086840).

Almost surely, 2^215430213 is an apocalyptic number.

215430213 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

215430213 is a deficient number, since it is larger than the sum of its proper divisors (89959227).

215430213 is a wasteful number, since it uses less digits than its factorization.

215430213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58988.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 215430213 is about 14677.5411087825. The cubic root of 215430213 is about 599.4719548613.

Adding to 215430213 its reverse (312034512), we get a palindrome (527464725).

The spelling of 215430213 in words is "two hundred fifteen million, four hundred thirty thousand, two hundred thirteen".