438216241 has 4 divisors (see below), whose sum is σ = 448904484. Its totient is φ = 427528000.

The previous prime is 438216223. The next prime is 438216257. The reversal of 438216241 is 142612834.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 61701025 + 376515216 = 7855^2 + 19404^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-438216241 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (438216211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5344060 + ... + 5344141.

It is an arithmetic number, because the mean of its divisors is an integer number (112226121).

Almost surely, 2^438216241 is an apocalyptic number.

438216241 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

438216241 is a deficient number, since it is larger than the sum of its proper divisors (10688243).

438216241 is a wasteful number, since it uses less digits than its factorization.

438216241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10688242.

The product of its digits is 9216, while the sum is 31.

The square root of 438216241 is about 20933.6150962991. The cubic root of 438216241 is about 759.5612893927.

The spelling of 438216241 in words is "four hundred thirty-eight million, two hundred sixteen thousand, two hundred forty-one".