215430415 has 16 divisors (see below), whose sum is σ = 267883200. Its totient is φ = 166120192.

The previous prime is 215430407. The next prime is 215430419. The reversal of 215430415 is 514034512.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 215430415 - 2³ = 215430407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 215430415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215430419) 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, 137406 + ... + 138964.

It is an arithmetic number, because the mean of its divisors is an integer number (16742700).

Almost surely, 2^215430415 is an apocalyptic number.

215430415 is a deficient number, since it is larger than the sum of its proper divisors (52452785).

215430415 is a wasteful number, since it uses less digits than its factorization.

215430415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 215430415 is about 14677.5479900425. The cubic root of 215430415 is about 599.4721422280.

Adding to 215430415 its reverse (514034512), we get a palindrome (729464927).

The spelling of 215430415 in words is "two hundred fifteen million, four hundred thirty thousand, four hundred fifteen".