216531671588 has 24 divisors (see below), whose sum is σ = 386785627200. Its totient is φ = 106035136928.

The previous prime is 216531671581. The next prime is 216531671593. The reversal of 216531671588 is 885176135612.

It is not an unprimeable number, because it can be changed into a prime (216531671581) 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, 1641920 + ... + 1768887.

It is an arithmetic number, because the mean of its divisors is an integer number (16116067800).

Almost surely, 2^216531671588 is an apocalyptic number.

It is an amenable number.

216531671588 is a deficient number, since it is larger than the sum of its proper divisors (170253955612).

216531671588 is a wasteful number, since it uses less digits than its factorization.

216531671588 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3411139 (or 3411137 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 53.

The spelling of 216531671588 in words is "two hundred sixteen billion, five hundred thirty-one million, six hundred seventy-one thousand, five hundred eighty-eight".