31111422143 has 2 divisors, whose sum is σ = 31111422144. Its totient is φ = 31111422142.

The previous prime is 31111422109. The next prime is 31111422179. The reversal of 31111422143 is 34122411113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31111422143 - 2¹² = 31111418047 is a prime.

It is a super-3 number, since 3×31111422143³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31111422103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15555711071 + 15555711072.

It is an arithmetic number, because the mean of its divisors is an integer number (15555711072).

Almost surely, 2^31111422143 is an apocalyptic number.

31111422143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31111422143 is an equidigital number, since it uses as much as digits as its factorization.

31111422143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 23.

Adding to 31111422143 its reverse (34122411113), we get a palindrome (65233833256).

The spelling of 31111422143 in words is "thirty-one billion, one hundred eleven million, four hundred twenty-two thousand, one hundred forty-three".