440421231 has 8 divisors (see below), whose sum is σ = 607477680. Its totient is φ = 283489472.

The previous prime is 440421169. The next prime is 440421257. The reversal of 440421231 is 132124044.

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 440421231 - 2⁶ = 440421167 is a prime.

It is a super-2 number, since 2×440421231² = 387941721431110722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 440421198 and 440421207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440420231) 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, 2531070 + ... + 2531243.

It is an arithmetic number, because the mean of its divisors is an integer number (75934710).

Almost surely, 2^440421231 is an apocalyptic number.

440421231 is a deficient number, since it is larger than the sum of its proper divisors (167056449).

440421231 is a wasteful number, since it uses less digits than its factorization.

440421231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5062345.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 440421231 is about 20986.2152614520. The cubic root of 440421231 is about 760.8331301134.

Adding to 440421231 its reverse (132124044), we get a palindrome (572545275).

The spelling of 440421231 in words is "four hundred forty million, four hundred twenty-one thousand, two hundred thirty-one".