216434641 has 8 divisors (see below), whose sum is σ = 220302720. Its totient is φ = 212594928.

The previous prime is 216434593. The next prime is 216434677. The reversal of 216434641 is 146434612.

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 216434641 - 2²⁵ = 182880209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216434041) 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, 8610 + ... + 22516.

It is an arithmetic number, because the mean of its divisors is an integer number (27537840).

Almost surely, 2^216434641 is an apocalyptic number.

It is an amenable number.

216434641 is a deficient number, since it is larger than the sum of its proper divisors (3868079).

216434641 is a wasteful number, since it uses less digits than its factorization.

216434641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14183.

The product of its digits is 13824, while the sum is 31.

The square root of 216434641 is about 14711.7178126825. The cubic root of 216434641 is about 600.4021757346.

The spelling of 216434641 in words is "two hundred sixteen million, four hundred thirty-four thousand, six hundred forty-one".