43220231 has 8 divisors (see below), whose sum is σ = 46963200. Its totient is φ = 39624120.

The previous prime is 43220209. The next prime is 43220251. The reversal of 43220231 is 13202234.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43220231 - 2¹⁸ = 42958087 is a prime.

It is a super-2 number, since 2×43220231² = 3735976735386722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43220251) 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, 36101 + ... + 37278.

It is an arithmetic number, because the mean of its divisors is an integer number (5870400).

Almost surely, 2^43220231 is an apocalyptic number.

43220231 is a deficient number, since it is larger than the sum of its proper divisors (3742969).

43220231 is a wasteful number, since it uses less digits than its factorization.

43220231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73429.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 43220231 is about 6574.2095342330. The cubic root of 43220231 is about 350.9368939289.

Adding to 43220231 its reverse (13202234), we get a palindrome (56422465).

The spelling of 43220231 in words is "forty-three million, two hundred twenty thousand, two hundred thirty-one".