216493072 has 20 divisors (see below), whose sum is σ = 420437500. Its totient is φ = 107993088.

The previous prime is 216493051. The next prime is 216493093. The reversal of 216493072 is 270394612.

It is an interprime number because it is at equal distance from previous prime (216493051) and next prime (216493093).

It can be written as a sum of positive squares in 2 ways, for example, as 77158656 + 139334416 = 8784^2 + 11804^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 8697 + ... + 22552.

It is an arithmetic number, because the mean of its divisors is an integer number (21021875).

Almost surely, 2^216493072 is an apocalyptic number.

It is an amenable number.

216493072 is a deficient number, since it is larger than the sum of its proper divisors (203944428).

216493072 is a wasteful number, since it uses less digits than its factorization.

216493072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31690 (or 31684 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 216493072 is about 14713.7035446552. The cubic root of 216493072 is about 600.4562011944.

The spelling of 216493072 in words is "two hundred sixteen million, four hundred ninety-three thousand, seventy-two".