216431201 has 8 divisors (see below), whose sum is σ = 249130560. Its totient is φ = 184177008.

The previous prime is 216431177. The next prime is 216431207. The reversal of 216431201 is 102134612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216431201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216431207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110246 + ... + 112191.

It is an arithmetic number, because the mean of its divisors is an integer number (31141320).

Almost surely, 2^216431201 is an apocalyptic number.

It is an amenable number.

216431201 is a deficient number, since it is larger than the sum of its proper divisors (32699359).

216431201 is a wasteful number, since it uses less digits than its factorization.

216431201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222583.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 216431201 is about 14711.6008986106. The cubic root of 216431201 is about 600.3989947983.

Adding to 216431201 its reverse (102134612), we get a palindrome (318565813).

The spelling of 216431201 in words is "two hundred sixteen million, four hundred thirty-one thousand, two hundred one".