12245973731 has 4 divisors (see below), whose sum is σ = 12576946032. Its totient is φ = 11915001432.

The previous prime is 12245973703. The next prime is 12245973757. The reversal of 12245973731 is 13737954221.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12245973731 is a prime.

It is a super-2 number, since 2×12245973731² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12245973791) 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, 165486095 + ... + 165486168.

It is an arithmetic number, because the mean of its divisors is an integer number (3144236508).

Almost surely, 2^12245973731 is an apocalyptic number.

12245973731 is a deficient number, since it is larger than the sum of its proper divisors (330972301).

12245973731 is an equidigital number, since it uses as much as digits as its factorization.

12245973731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330972300.

The product of its digits is 317520, while the sum is 44.

The spelling of 12245973731 in words is "twelve billion, two hundred forty-five million, nine hundred seventy-three thousand, seven hundred thirty-one".