216168492 has 24 divisors (see below), whose sum is σ = 507012016. Its totient is φ = 71682048.

The previous prime is 216168461. The next prime is 216168493. The reversal of 216168492 is 294861612.

It is a self number, because there is not a number n which added to its sum of digits gives 216168492.

It is not an unprimeable number, because it can be changed into a prime (216168493) 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, 44353 + ... + 48984.

Almost surely, 2^216168492 is an apocalyptic number.

It is an amenable number.

216168492 is an abundant number, since it is smaller than the sum of its proper divisors (290843524).

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

216168492 is a wasteful number, since it uses less digits than its factorization.

216168492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93537 (or 93535 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 216168492 is about 14702.6695535199. The cubic root of 216168492 is about 600.1559705629.

The spelling of 216168492 in words is "two hundred sixteen million, one hundred sixty-eight thousand, four hundred ninety-two".