216236560 has 40 divisors (see below), whose sum is σ = 503389656. Its totient is φ = 86384640.

The previous prime is 216236533. The next prime is 216236597. The reversal of 216236560 is 65632612.

It can be written as a sum of positive squares in 4 ways, for example, as 22581504 + 193655056 = 4752^2 + 13916^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96250 + ... + 98470.

Almost surely, 2^216236560 is an apocalyptic number.

216236560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216236560 is an abundant number, since it is smaller than the sum of its proper divisors (287153096).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

216236560 is a wasteful number, since it uses less digits than its factorization.

216236560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451 (or 3445 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 216236560 is about 14704.9841890428. The cubic root of 216236560 is about 600.2189571236.

The spelling of 216236560 in words is "two hundred sixteen million, two hundred thirty-six thousand, five hundred sixty".