215639097 has 8 divisors (see below), whose sum is σ = 287681856. Its totient is φ = 143677872.

The previous prime is 215639089. The next prime is 215639129. The reversal of 215639097 is 790936512.

215639097 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 215639097 - 2³ = 215639089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (215639027) 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, 13918 + ... + 24999.

It is an arithmetic number, because the mean of its divisors is an integer number (35960232).

Almost surely, 2^215639097 is an apocalyptic number.

It is an amenable number.

215639097 is a deficient number, since it is larger than the sum of its proper divisors (72042759).

215639097 is a wasteful number, since it uses less digits than its factorization.

215639097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40767.

The product of its (nonzero) digits is 102060, while the sum is 42.

The square root of 215639097 is about 14684.6551542758. The cubic root of 215639097 is about 599.6656442672.

The spelling of 215639097 in words is "two hundred fifteen million, six hundred thirty-nine thousand, ninety-seven".