215430215 has 108 divisors (see below), whose sum is σ = 366253272. Its totient is φ = 121080960.

The previous prime is 215430211. The next prime is 215430247. The reversal of 215430215 is 512034512.

It is not a de Polignac number, because 215430215 - 2² = 215430211 is a prime.

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 107 ways as a sum of consecutive naturals, for example, 5009984 + ... + 5010026.

It is an arithmetic number, because the mean of its divisors is an integer number (3391234).

Almost surely, 2^215430215 is an apocalyptic number.

215430215 is a deficient number, since it is larger than the sum of its proper divisors (150823057).

215430215 is a wasteful number, since it uses less digits than its factorization.

215430215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 79 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 215430215 is about 14677.5411769138. The cubic root of 215430215 is about 599.4719567164.

Adding to 215430215 its reverse (512034512), we get a palindrome (727464727).

The spelling of 215430215 in words is "two hundred fifteen million, four hundred thirty thousand, two hundred fifteen".