217430587916 has 6 divisors (see below), whose sum is σ = 380503528860. Its totient is φ = 108715293956.

The previous prime is 217430587873. The next prime is 217430587987. The reversal of 217430587916 is 619785034712.

It is a super-2 number, since 2×217430587916² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 27178823486 + ... + 27178823493.

It is an arithmetic number, because the mean of its divisors is an integer number (63417254810).

It is a 1-persistent number, because it is pandigital, but 2⋅217430587916 = 434861175832 is not.

Almost surely, 2^217430587916 is an apocalyptic number.

It is an amenable number.

217430587916 is a deficient number, since it is larger than the sum of its proper divisors (163072940944).

217430587916 is a wasteful number, since it uses less digits than its factorization.

217430587916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54357646983 (or 54357646981 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 53.

The spelling of 217430587916 in words is "two hundred seventeen billion, four hundred thirty million, five hundred eighty-seven thousand, nine hundred sixteen".