12243520031 has 4 divisors (see below), whose sum is σ = 12243970992. Its totient is φ = 12243069072.

The previous prime is 12243520027. The next prime is 12243520087. The reversal of 12243520031 is 13002534221.

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 12243520031 - 2² = 12243520027 is a prime.

It is a super-2 number, since 2×12243520031² (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 = 12243519979 and 12243520006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12243520021) 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, 181955 + ... + 239988.

It is an arithmetic number, because the mean of its divisors is an integer number (3060992748).

Almost surely, 2^12243520031 is an apocalyptic number.

12243520031 is a deficient number, since it is larger than the sum of its proper divisors (450961).

12243520031 is an equidigital number, since it uses as much as digits as its factorization.

12243520031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450960.

The product of its (nonzero) digits is 1440, while the sum is 23.

The spelling of 12243520031 in words is "twelve billion, two hundred forty-three million, five hundred twenty thousand, thirty-one".