440233231 has 2 divisors, whose sum is σ = 440233232. Its totient is φ = 440233230.

The previous prime is 440233219. The next prime is 440233237. The reversal of 440233231 is 132332044.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 440233231 - 2¹³ = 440225039 is a prime.

It is a super-2 number, since 2×440233231² = 387610595353398722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440233237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220116615 + 220116616.

It is an arithmetic number, because the mean of its divisors is an integer number (220116616).

Almost surely, 2^440233231 is an apocalyptic number.

440233231 is a deficient number, since it is larger than the sum of its proper divisors (1).

440233231 is an equidigital number, since it uses as much as digits as its factorization.

440233231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 440233231 is about 20981.7356527052. The cubic root of 440233231 is about 760.7248572634.

Adding to 440233231 its reverse (132332044), we get a palindrome (572565275).

The spelling of 440233231 in words is "four hundred forty million, two hundred thirty-three thousand, two hundred thirty-one".