12400425431 has 2 divisors, whose sum is σ = 12400425432. Its totient is φ = 12400425430.

The previous prime is 12400425407. The next prime is 12400425463. The reversal of 12400425431 is 13452400421.

It is a weak prime.

It is an emirp because it is prime and its reverse (13452400421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12400425431 is a prime.

It is a super-2 number, since 2×12400425431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12400425431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12400425731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6200212715 + 6200212716.

It is an arithmetic number, because the mean of its divisors is an integer number (6200212716).

Almost surely, 2^12400425431 is an apocalyptic number.

12400425431 is a deficient number, since it is larger than the sum of its proper divisors (1).

12400425431 is an equidigital number, since it uses as much as digits as its factorization.

12400425431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 12400425431 its reverse (13452400421), we get a palindrome (25852825852).

The spelling of 12400425431 in words is "twelve billion, four hundred million, four hundred twenty-five thousand, four hundred thirty-one".