216155512 has 8 divisors (see below), whose sum is σ = 405291600. Its totient is φ = 108077752.

The previous prime is 216155483. The next prime is 216155521. The reversal of 216155512 is 215551612.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

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 as a sum of consecutive naturals, namely, 13509712 + ... + 13509727.

It is an arithmetic number, because the mean of its divisors is an integer number (50661450).

Almost surely, 2^216155512 is an apocalyptic number.

It is an amenable number.

216155512 is a deficient number, since it is larger than the sum of its proper divisors (189136088).

216155512 is a wasteful number, since it uses less digits than its factorization.

216155512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27019445 (or 27019441 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The square root of 216155512 is about 14702.2281304570. The cubic root of 216155512 is about 600.1439580500.

The spelling of 216155512 in words is "two hundred sixteen million, one hundred fifty-five thousand, five hundred twelve".