216711201 has 16 divisors (see below), whose sum is σ = 331184000. Its totient is φ = 123475968.

The previous prime is 216711193. The next prime is 216711217. The reversal of 216711201 is 102117612.

It is a happy number.

It is not a de Polignac number, because 216711201 - 2³ = 216711193 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (216711251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7456 + ... + 22113.

It is an arithmetic number, because the mean of its divisors is an integer number (20699000).

Almost surely, 2^216711201 is an apocalyptic number.

216711201 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

216711201 is a deficient number, since it is larger than the sum of its proper divisors (114472799).

216711201 is a wasteful number, since it uses less digits than its factorization.

216711201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29928.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 216711201 is about 14721.1141222395. The cubic root of 216711201 is about 600.6577980172.

Adding to 216711201 its reverse (102117612), we get a palindrome (318828813).

The spelling of 216711201 in words is "two hundred sixteen million, seven hundred eleven thousand, two hundred one".