43281331 has 8 divisors (see below), whose sum is σ = 45229824. Its totient is φ = 41338440.

The previous prime is 43281319. The next prime is 43281353. The reversal of 43281331 is 13318234.

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 43281331 - 2⁵ = 43281299 is a prime.

It is a super-3 number, since 3×43281331³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43281296 and 43281305.

It is not an unprimeable number, because it can be changed into a prime (43281131) 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, 26130 + ... + 27736.

It is an arithmetic number, because the mean of its divisors is an integer number (5653728).

Almost surely, 2^43281331 is an apocalyptic number.

43281331 is a deficient number, since it is larger than the sum of its proper divisors (1948493).

43281331 is a wasteful number, since it uses less digits than its factorization.

43281331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801.

The product of its digits is 1728, while the sum is 25.

The square root of 43281331 is about 6578.8548395598. The cubic root of 43281331 is about 351.1021880317.

Adding to 43281331 its reverse (13318234), we get a palindrome (56599565).

The spelling of 43281331 in words is "forty-three million, two hundred eighty-one thousand, three hundred thirty-one".