215889072097 has 4 divisors (see below), whose sum is σ = 215890292016. Its totient is φ = 215887852180.

The previous prime is 215889072037. The next prime is 215889072109. The reversal of 215889072097 is 790270988512.

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 215889072097 - 2⁷ = 215889071969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (215889072037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287779 + ... + 717352.

It is an arithmetic number, because the mean of its divisors is an integer number (53972573004).

Almost surely, 2^215889072097 is an apocalyptic number.

It is an amenable number.

215889072097 is a deficient number, since it is larger than the sum of its proper divisors (1219919).

215889072097 is a wasteful number, since it uses less digits than its factorization.

215889072097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1219918.

The product of its (nonzero) digits is 5080320, while the sum is 58.

The spelling of 215889072097 in words is "two hundred fifteen billion, eight hundred eighty-nine million, seventy-two thousand, ninety-seven".