31144020335189 has 2 divisors, whose sum is σ = 31144020335190. Its totient is φ = 31144020335188.

The previous prime is 31144020335011. The next prime is 31144020335201. The reversal of 31144020335189 is 98153302044113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28656129272164 + 2487891063025 = 5353142^2 + 1577305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31144020335189 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31144020365189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572010167594 + 15572010167595.

It is an arithmetic number, because the mean of its divisors is an integer number (15572010167595).

Almost surely, 2^{31144020335189} is an apocalyptic number.

It is an amenable number.

31144020335189 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144020335189 is an equidigital number, since it uses as much as digits as its factorization.

31144020335189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 31144020335189 in words is "thirty-one trillion, one hundred forty-four billion, twenty million, three hundred thirty-five thousand, one hundred eighty-nine".