216369850 has 24 divisors (see below), whose sum is σ = 410046300. Its totient is φ = 84913920.

The previous prime is 216369827. The next prime is 216369871. The reversal of 216369850 is 58963612.

It can be written as a sum of positive squares in 6 ways, for example, as 143113369 + 73256481 = 11963^2 + 8559^2 .

It is an alternating number because its digits alternate between even and odd.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38175 + ... + 43474.

Almost surely, 2^216369850 is an apocalyptic number.

216369850 is a deficient number, since it is larger than the sum of its proper divisors (193676450).

216369850 is a wasteful number, since it uses less digits than its factorization.

216369850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81714 (or 81709 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 216369850 is about 14709.5156276473. The cubic root of 216369850 is about 600.3422584319.

The spelling of 216369850 in words is "two hundred sixteen million, three hundred sixty-nine thousand, eight hundred fifty".