216581676 has 24 divisors (see below), whose sum is σ = 509832624. Its totient is φ = 71554560.

The previous prime is 216581671. The next prime is 216581681. The reversal of 216581676 is 676185612.

It is an interprime number because it is at equal distance from previous prime (216581671) and next prime (216581681).

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (216581671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78505 + ... + 81216.

It is an arithmetic number, because the mean of its divisors is an integer number (21243026).

Almost surely, 2^216581676 is an apocalyptic number.

It is an amenable number.

216581676 is an abundant number, since it is smaller than the sum of its proper divisors (293250948).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216581676 is a wasteful number, since it uses less digits than its factorization.

216581676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159841 (or 159839 counting only the distinct ones).

The product of its digits is 120960, while the sum is 42.

The square root of 216581676 is about 14716.7141713088. The cubic root of 216581676 is about 600.5381061476.

The spelling of 216581676 in words is "two hundred sixteen million, five hundred eighty-one thousand, six hundred seventy-six".