440213231 has 8 divisors (see below), whose sum is σ = 451358160. Its totient is φ = 429109632.

The previous prime is 440213227. The next prime is 440213303. The reversal of 440213231 is 132312044.

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 440213231 - 2² = 440213227 is a prime.

It is a super-2 number, since 2×440213231² = 387575377494918722, 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 (440210231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11831 + ... + 31943.

It is an arithmetic number, because the mean of its divisors is an integer number (56419770).

Almost surely, 2^440213231 is an apocalyptic number.

440213231 is a deficient number, since it is larger than the sum of its proper divisors (11144929).

440213231 is a wasteful number, since it uses less digits than its factorization.

440213231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20665.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 440213231 is about 20981.2590422977. The cubic root of 440213231 is about 760.7133370611.

Adding to 440213231 its reverse (132312044), we get a palindrome (572525275).

The spelling of 440213231 in words is "four hundred forty million, two hundred thirteen thousand, two hundred thirty-one".