31144332143 has 2 divisors, whose sum is σ = 31144332144. Its totient is φ = 31144332142.

The previous prime is 31144332113. The next prime is 31144332179. The reversal of 31144332143 is 34123344113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31144332143 - 2¹⁶ = 31144266607 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31144332103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572166071 + 15572166072.

It is an arithmetic number, because the mean of its divisors is an integer number (15572166072).

Almost surely, 2^31144332143 is an apocalyptic number.

31144332143 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144332143 is an equidigital number, since it uses as much as digits as its factorization.

31144332143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 29.

Adding to 31144332143 its reverse (34123344113), we get a palindrome (65267676256).

The spelling of 31144332143 in words is "thirty-one billion, one hundred forty-four million, three hundred thirty-two thousand, one hundred forty-three".