215213663 has 8 divisors (see below), whose sum is σ = 247610400. Its totient is φ = 183229920.

The previous prime is 215213657. The next prime is 215213699. The reversal of 215213663 is 366312512.

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

It is a cyclic number.

It is not a de Polignac number, because 215213663 - 2⁸ = 215213407 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 (215213623) 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, 102128 + ... + 104213.

It is an arithmetic number, because the mean of its divisors is an integer number (30951300).

Almost surely, 2^215213663 is an apocalyptic number.

215213663 is a deficient number, since it is larger than the sum of its proper divisors (32396737).

215213663 is a wasteful number, since it uses less digits than its factorization.

215213663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206497.

The product of its digits is 6480, while the sum is 29.

The square root of 215213663 is about 14670.1623372068. The cubic root of 215213663 is about 599.2710248693.

The spelling of 215213663 in words is "two hundred fifteen million, two hundred thirteen thousand, six hundred sixty-three".