1231224423 has 16 divisors (see below), whose sum is σ = 1928631936. Its totient is φ = 688796640.

The previous prime is 1231224413. The next prime is 1231224479. The reversal of 1231224423 is 3244221321.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-1231224423 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1231224393 and 1231224402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231224403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1434565 + ... + 1435422.

It is an arithmetic number, because the mean of its divisors is an integer number (120539496).

Almost surely, 2^1231224423 is an apocalyptic number.

1231224423 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1231224423 is a deficient number, since it is larger than the sum of its proper divisors (697407513).

1231224423 is a wasteful number, since it uses less digits than its factorization.

1231224423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2870014.

The product of its digits is 2304, while the sum is 24.

The square root of 1231224423 is about 35088.8076599932. The cubic root of 1231224423 is about 1071.7966795168.

Adding to 1231224423 its reverse (3244221321), we get a palindrome (4475445744).

The spelling of 1231224423 in words is "one billion, two hundred thirty-one million, two hundred twenty-four thousand, four hundred twenty-three".