31420131143 has 2 divisors, whose sum is σ = 31420131144. Its totient is φ = 31420131142.

The previous prime is 31420131133. The next prime is 31420131167. The reversal of 31420131143 is 34113102413.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31420131143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31420131133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15710065571 + 15710065572.

It is an arithmetic number, because the mean of its divisors is an integer number (15710065572).

Almost surely, 2^31420131143 is an apocalyptic number.

31420131143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31420131143 is an equidigital number, since it uses as much as digits as its factorization.

31420131143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 31420131143 its reverse (34113102413), we get a palindrome (65533233556).

The spelling of 31420131143 in words is "thirty-one billion, four hundred twenty million, one hundred thirty-one thousand, one hundred forty-three".