31425140443 has 2 divisors, whose sum is σ = 31425140444. Its totient is φ = 31425140442.

The previous prime is 31425140413. The next prime is 31425140507. The reversal of 31425140443 is 34404152413.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31425140443 is a prime.

It is not a weakly prime, because it can be changed into another prime (31425140413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712570221 + 15712570222.

It is an arithmetic number, because the mean of its divisors is an integer number (15712570222).

Almost surely, 2^31425140443 is an apocalyptic number.

31425140443 is a deficient number, since it is larger than the sum of its proper divisors (1).

31425140443 is an equidigital number, since it uses as much as digits as its factorization.

31425140443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 31425140443 its reverse (34404152413), we get a palindrome (65829292856).

The spelling of 31425140443 in words is "thirty-one billion, four hundred twenty-five million, one hundred forty thousand, four hundred forty-three".