216500650 has 12 divisors (see below), whose sum is σ = 402691302. Its totient is φ = 86600240.

The previous prime is 216500639. The next prime is 216500681. The reversal of 216500650 is 56005612.

It can be written as a sum of positive squares in 3 ways, for example, as 154579489 + 61921161 = 12433^2 + 7869^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2164957 + ... + 2165056.

Almost surely, 2^216500650 is an apocalyptic number.

216500650 is a deficient number, since it is larger than the sum of its proper divisors (186190652).

216500650 is a wasteful number, since it uses less digits than its factorization.

216500650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330025 (or 4330020 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 216500650 is about 14713.9610574447. The cubic root of 216500650 is about 600.4632071214.

The spelling of 216500650 in words is "two hundred sixteen million, five hundred thousand, six hundred fifty".