216458121 has 8 divisors (see below), whose sum is σ = 314848224. Its totient is φ = 131186720.

The previous prime is 216458069. The next prime is 216458141. The reversal of 216458121 is 121854612.

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 216458121 - 2¹³ = 216449929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216458141) 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, 3279636 + ... + 3279701.

It is an arithmetic number, because the mean of its divisors is an integer number (39356028).

Almost surely, 2^216458121 is an apocalyptic number.

It is an amenable number.

216458121 is a deficient number, since it is larger than the sum of its proper divisors (98390103).

216458121 is a wasteful number, since it uses less digits than its factorization.

216458121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6559351.

The product of its digits is 3840, while the sum is 30.

The square root of 216458121 is about 14712.5157943840. The cubic root of 216458121 is about 600.4238865742.

The spelling of 216458121 in words is "two hundred sixteen million, four hundred fifty-eight thousand, one hundred twenty-one".