231444421 has 8 divisors (see below), whose sum is σ = 252252000. Its totient is φ = 211066032.

The previous prime is 231444413. The next prime is 231444427. The reversal of 231444421 is 124444132.

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 231444421 - 2³ = 231444413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231444427) 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 in 7 ways as a sum of consecutive naturals, for example, 106171 + ... + 108328.

It is an arithmetic number, because the mean of its divisors is an integer number (31531500).

Almost surely, 2^231444421 is an apocalyptic number.

It is an amenable number.

231444421 is a deficient number, since it is larger than the sum of its proper divisors (20807579).

231444421 is a wasteful number, since it uses less digits than its factorization.

231444421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214595.

The product of its digits is 3072, while the sum is 25.

The square root of 231444421 is about 15213.2975058006. The cubic root of 231444421 is about 613.9724803491.

Adding to 231444421 its reverse (124444132), we get a palindrome (355888553).

The spelling of 231444421 in words is "two hundred thirty-one million, four hundred forty-four thousand, four hundred twenty-one".