12520503431 has 4 divisors (see below), whose sum is σ = 12520744200. Its totient is φ = 12520262664.

The previous prime is 12520503421. The next prime is 12520503467. The reversal of 12520503431 is 13430502521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13430502521 = 17203 ⋅780707.

It is a cyclic number.

It is not a de Polignac number, because 12520503431 - 2¹⁸ = 12520241287 is a prime.

It is a super-2 number, since 2×12520503431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12520503431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520503421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6416 + ... + 158373.

It is an arithmetic number, because the mean of its divisors is an integer number (3130186050).

Almost surely, 2^12520503431 is an apocalyptic number.

12520503431 is a deficient number, since it is larger than the sum of its proper divisors (240769).

12520503431 is an equidigital number, since it uses as much as digits as its factorization.

12520503431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240768.

The product of its (nonzero) digits is 3600, while the sum is 26.

The spelling of 12520503431 in words is "twelve billion, five hundred twenty million, five hundred three thousand, four hundred thirty-one".