216898325587 has 4 divisors (see below), whose sum is σ = 216913940320. Its totient is φ = 216882710856.

The previous prime is 216898325573. The next prime is 216898325599. The reversal of 216898325587 is 785523898612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216898325587 - 2¹⁹ = 216897801299 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216898305587) 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, 7786512 + ... + 7814317.

It is an arithmetic number, because the mean of its divisors is an integer number (54228485080).

Almost surely, 2^216898325587 is an apocalyptic number.

216898325587 is a deficient number, since it is larger than the sum of its proper divisors (15614733).

216898325587 is a wasteful number, since it uses less digits than its factorization.

216898325587 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15614732.

The product of its digits is 58060800, while the sum is 64.

The spelling of 216898325587 in words is "two hundred sixteen billion, eight hundred ninety-eight million, three hundred twenty-five thousand, five hundred eighty-seven".