216394712 has 8 divisors (see below), whose sum is σ = 405740100. Its totient is φ = 108197352.

The previous prime is 216394697. The next prime is 216394727. The reversal of 216394712 is 217493612.

It is an interprime number because it is at equal distance from previous prime (216394697) and next prime (216394727).

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 (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13524662 + ... + 13524677.

Almost surely, 2^216394712 is an apocalyptic number.

It is an amenable number.

216394712 is a deficient number, since it is larger than the sum of its proper divisors (189345388).

216394712 is a wasteful number, since it uses less digits than its factorization.

216394712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27049345 (or 27049341 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 216394712 is about 14710.3607025797. The cubic root of 216394712 is about 600.3652516810.

The spelling of 216394712 in words is "two hundred sixteen million, three hundred ninety-four thousand, seven hundred twelve".