216436441 has 12 divisors (see below), whose sum is σ = 235458048. Its totient is φ = 198856944.

The previous prime is 216436427. The next prime is 216436477. The reversal of 216436441 is 144634612.

It is not a de Polignac number, because 216436441 - 2¹³ = 216428249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216436481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34816 + ... + 40558.

It is an arithmetic number, because the mean of its divisors is an integer number (19621504).

Almost surely, 2^216436441 is an apocalyptic number.

It is an amenable number.

216436441 is a deficient number, since it is larger than the sum of its proper divisors (19021607).

216436441 is a wasteful number, since it uses less digits than its factorization.

216436441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5992 (or 5979 counting only the distinct ones).

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

The square root of 216436441 is about 14711.7789882801. The cubic root of 216436441 is about 600.4038401646.

The spelling of 216436441 in words is "two hundred sixteen million, four hundred thirty-six thousand, four hundred forty-one".