215730093 has 8 divisors (see below), whose sum is σ = 288679648. Its totient is φ = 143300304.

The previous prime is 215730077. The next prime is 215730103. The reversal of 215730093 is 390037512.

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

It is not a de Polignac number, because 215730093 - 2⁴ = 215730077 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 215730093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215731093) 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, 128971 + ... + 130632.

It is an arithmetic number, because the mean of its divisors is an integer number (36084956).

Almost surely, 2^215730093 is an apocalyptic number.

It is an amenable number.

215730093 is a deficient number, since it is larger than the sum of its proper divisors (72949555).

215730093 is a wasteful number, since it uses less digits than its factorization.

215730093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259883.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 215730093 is about 14687.7531637756. The cubic root of 215730093 is about 599.7499819439.

The spelling of 215730093 in words is "two hundred fifteen million, seven hundred thirty thousand, ninety-three".