12523503031 has 4 divisors (see below), whose sum is σ = 13486849432. Its totient is φ = 11560156632.

The previous prime is 12523503029. The next prime is 12523503037. The reversal of 12523503031 is 13030532521.

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 12523503031 - 2¹ = 12523503029 is a prime.

It is a super-2 number, since 2×12523503031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12523502987 and 12523503005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12523503037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481673181 + ... + 481673206.

It is an arithmetic number, because the mean of its divisors is an integer number (3371712358).

Almost surely, 2^12523503031 is an apocalyptic number.

12523503031 is a deficient number, since it is larger than the sum of its proper divisors (963346401).

12523503031 is an equidigital number, since it uses as much as digits as its factorization.

12523503031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963346400.

The product of its (nonzero) digits is 2700, while the sum is 25.

The spelling of 12523503031 in words is "twelve billion, five hundred twenty-three million, five hundred three thousand, thirty-one".