31144021232287 has 2 divisors, whose sum is σ = 31144021232288. Its totient is φ = 31144021232286.

The previous prime is 31144021232087. The next prime is 31144021232329. The reversal of 31144021232287 is 78223212044113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31144021232287 is a prime.

It is a super-2 number, since 2×31144021232287² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31144021232087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15572010616143 + 15572010616144.

It is an arithmetic number, because the mean of its divisors is an integer number (15572010616144).

Almost surely, 2^{31144021232287} is an apocalyptic number.

31144021232287 is a deficient number, since it is larger than the sum of its proper divisors (1).

31144021232287 is an equidigital number, since it uses as much as digits as its factorization.

31144021232287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 40.

The spelling of 31144021232287 in words is "thirty-one trillion, one hundred forty-four billion, twenty-one million, two hundred thirty-two thousand, two hundred eighty-seven".