215115027697 has 4 divisors (see below), whose sum is σ = 226436871280. Its totient is φ = 203793184116.

The previous prime is 215115027691. The next prime is 215115027731. The reversal of 215115027697 is 796720511512.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 215115027697 - 2³ = 215115027689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215115027691) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5660921763 + ... + 5660921800.

It is an arithmetic number, because the mean of its divisors is an integer number (56609217820).

Almost surely, 2^215115027697 is an apocalyptic number.

It is an amenable number.

215115027697 is a deficient number, since it is larger than the sum of its proper divisors (11321843583).

215115027697 is a wasteful number, since it uses less digits than its factorization.

215115027697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11321843582.

The product of its (nonzero) digits is 264600, while the sum is 46.

The spelling of 215115027697 in words is "two hundred fifteen billion, one hundred fifteen million, twenty-seven thousand, six hundred ninety-seven".