1531112423 has 4 divisors (see below), whose sum is σ = 1531417800. Its totient is φ = 1530807048.

The previous prime is 1531112419. The next prime is 1531112447. The reversal of 1531112423 is 3242111351.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1531112423 - 2² = 1531112419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1531112923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145040 + ... + 155237.

It is an arithmetic number, because the mean of its divisors is an integer number (382854450).

Almost surely, 2^1531112423 is an apocalyptic number.

1531112423 is a deficient number, since it is larger than the sum of its proper divisors (305377).

1531112423 is an equidigital number, since it uses as much as digits as its factorization.

1531112423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305376.

The product of its digits is 720, while the sum is 23.

The square root of 1531112423 is about 39129.4316723359. The cubic root of 1531112423 is about 1152.5745527974.

Adding to 1531112423 its reverse (3242111351), we get a palindrome (4773223774).

The spelling of 1531112423 in words is "one billion, five hundred thirty-one million, one hundred twelve thousand, four hundred twenty-three".