216005464 has 16 divisors (see below), whose sum is σ = 405343800. Its totient is φ = 107913792.

The previous prime is 216005459. The next prime is 216005477. The reversal of 216005464 is 464500612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162 + ... + 20785.

Almost surely, 2^216005464 is an apocalyptic number.

It is an amenable number.

216005464 is a deficient number, since it is larger than the sum of its proper divisors (189338336).

216005464 is a wasteful number, since it uses less digits than its factorization.

216005464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22242 (or 22238 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 216005464 is about 14697.1243445784. The cubic root of 216005464 is about 600.0050592166.

The spelling of 216005464 in words is "two hundred sixteen million, five thousand, four hundred sixty-four".