216122401 has 8 divisors (see below), whose sum is σ = 236649600. Its totient is φ = 195741840.

The previous prime is 216122363. The next prime is 216122407. The reversal of 216122401 is 104221612.

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

It is a cyclic number.

It is not a de Polignac number, because 216122401 - 2⁹ = 216121889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216122407) 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 7 ways as a sum of consecutive naturals, for example, 33561 + ... + 39478.

It is an arithmetic number, because the mean of its divisors is an integer number (29581200).

Almost surely, 2^216122401 is an apocalyptic number.

It is an amenable number.

216122401 is a deficient number, since it is larger than the sum of its proper divisors (20527199).

216122401 is a wasteful number, since it uses less digits than its factorization.

216122401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73319.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 216122401 is about 14701.1020335212. The cubic root of 216122401 is about 600.1133128582.

The spelling of 216122401 in words is "two hundred sixteen million, one hundred twenty-two thousand, four hundred one".