215300661 has 8 divisors (see below), whose sum is σ = 287896224. Its totient is φ = 143119440.

The previous prime is 215300653. The next prime is 215300671. The reversal of 215300661 is 166003512.

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

It is not a de Polignac number, because 215300661 - 2³ = 215300653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215300651) 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, 102370 + ... + 104451.

It is an arithmetic number, because the mean of its divisors is an integer number (35987028).

Almost surely, 2^215300661 is an apocalyptic number.

It is an amenable number.

215300661 is a deficient number, since it is larger than the sum of its proper divisors (72595563).

215300661 is a wasteful number, since it uses less digits than its factorization.

215300661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207171.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 215300661 is about 14673.1271718063. The cubic root of 215300661 is about 599.3517637908.

The spelling of 215300661 in words is "two hundred fifteen million, three hundred thousand, six hundred sixty-one".