216383572 has 6 divisors (see below), whose sum is σ = 378671258. Its totient is φ = 108191784.

The previous prime is 216383569. The next prime is 216383579. The reversal of 216383572 is 275383612.

It can be written as a sum of positive squares in only one way, i.e., 183710916 + 32672656 = 13554^2 + 5716^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216383579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27047943 + ... + 27047950.

Almost surely, 2^216383572 is an apocalyptic number.

It is an amenable number.

216383572 is a deficient number, since it is larger than the sum of its proper divisors (162287686).

216383572 is a wasteful number, since it uses less digits than its factorization.

216383572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54095897 (or 54095895 counting only the distinct ones).

The product of its digits is 60480, while the sum is 37.

The square root of 216383572 is about 14709.9820530142. The cubic root of 216383572 is about 600.3549492363.

The spelling of 216383572 in words is "two hundred sixteen million, three hundred eighty-three thousand, five hundred seventy-two".