216705753 has 16 divisors (see below), whose sum is σ = 350232000. Its totient is φ = 131336640.

The previous prime is 216705739. The next prime is 216705799. The reversal of 216705753 is 357507612.

216705753 is a `hidden beast` number, since 2 + 16 + 70 + 575 + 3 = 666.

It is not a de Polignac number, because 216705753 - 2⁵ = 216705721 is a prime.

It is a super-2 number, since 2×216705753² = 93922766766594018, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216705253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 364528 + ... + 365121.

It is an arithmetic number, because the mean of its divisors is an integer number (21889500).

Almost surely, 2^216705753 is an apocalyptic number.

It is an amenable number.

216705753 is a deficient number, since it is larger than the sum of its proper divisors (133526247).

216705753 is a wasteful number, since it uses less digits than its factorization.

216705753 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729669 (or 729663 counting only the distinct ones).

The product of its (nonzero) digits is 44100, while the sum is 36.

The square root of 216705753 is about 14720.9290807340. The cubic root of 216705753 is about 600.6527645731.

The spelling of 216705753 in words is "two hundred sixteen million, seven hundred five thousand, seven hundred fifty-three".