231244443 has 16 divisors (see below), whose sum is σ = 345620640. Its totient is φ = 152796672.

The previous prime is 231244427. The next prime is 231244451. The reversal of 231244443 is 344442132.

It is a happy number.

It is not a de Polignac number, because 231244443 - 2⁴ = 231244427 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (231244483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34846 + ... + 40947.

It is an arithmetic number, because the mean of its divisors is an integer number (21601290).

Almost surely, 2^231244443 is an apocalyptic number.

231244443 is a deficient number, since it is larger than the sum of its proper divisors (114376197).

231244443 is a wasteful number, since it uses less digits than its factorization.

231244443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75915 (or 75909 counting only the distinct ones).

The product of its digits is 9216, while the sum is 27.

The square root of 231244443 is about 15206.7236116134. The cubic root of 231244443 is about 613.7955964593.

Adding to 231244443 its reverse (344442132), we get a palindrome (575686575).

The spelling of 231244443 in words is "two hundred thirty-one million, two hundred forty-four thousand, four hundred forty-three".