215430663 has 8 divisors (see below), whose sum is σ = 328275328. Its totient is φ = 123103224.

The previous prime is 215430599. The next prime is 215430689. The reversal of 215430663 is 366034512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 215430663 - 2⁶ = 215430599 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 215430663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215430263) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5129281 + ... + 5129322.

It is an arithmetic number, because the mean of its divisors is an integer number (41034416).

Almost surely, 2^215430663 is an apocalyptic number.

215430663 is a deficient number, since it is larger than the sum of its proper divisors (112844665).

215430663 is a wasteful number, since it uses less digits than its factorization.

215430663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10258613.

The product of its (nonzero) digits is 12960, while the sum is 30.

The square root of 215430663 is about 14677.5564383177. The cubic root of 215430663 is about 599.4723722621.

The spelling of 215430663 in words is "two hundred fifteen million, four hundred thirty thousand, six hundred sixty-three".