231223444 has 12 divisors (see below), whose sum is σ = 408354100. Its totient is φ = 114550848.

The previous prime is 231223423. The next prime is 231223463. The reversal of 231223444 is 444322132.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67076100 + 164147344 = 8190^2 + 12812^2 .

It is a super-2 number, since 2×231223444² = 106928562110442272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264729 + ... + 265600.

Almost surely, 2^231223444 is an apocalyptic number.

It is an amenable number.

231223444 is a deficient number, since it is larger than the sum of its proper divisors (177130656).

231223444 is a wasteful number, since it uses less digits than its factorization.

231223444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530442 (or 530440 counting only the distinct ones).

The product of its digits is 4608, while the sum is 25.

The square root of 231223444 is about 15206.0331447751. The cubic root of 231223444 is about 613.7770165766. Note that the first 3 decimals are identical.

Adding to 231223444 its reverse (444322132), we get a palindrome (675545576).

The spelling of 231223444 in words is "two hundred thirty-one million, two hundred twenty-three thousand, four hundred forty-four".