216863650 has 12 divisors (see below), whose sum is σ = 403366482. Its totient is φ = 86745440.

The previous prime is 216863639. The next prime is 216863671. The reversal of 216863650 is 56368612.

216863650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 80838081 + 136025569 = 8991^2 + 11663^2 .

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, 2168587 + ... + 2168686.

Almost surely, 2^216863650 is an apocalyptic number.

216863650 is a deficient number, since it is larger than the sum of its proper divisors (186502832).

216863650 is a wasteful number, since it uses less digits than its factorization.

216863650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4337285 (or 4337280 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 216863650 is about 14726.2911148734. The cubic root of 216863650 is about 600.7986124845.

The spelling of 216863650 in words is "two hundred sixteen million, eight hundred sixty-three thousand, six hundred fifty".