31240144133447 has 2 divisors, whose sum is σ = 31240144133448. Its totient is φ = 31240144133446.

The previous prime is 31240144133399. The next prime is 31240144133449. The reversal of 31240144133447 is 74433144104213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31240144133447 - 2¹⁶ = 31240144067911 is a prime.

Together with 31240144133449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31240144133449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620072066723 + 15620072066724.

It is an arithmetic number, because the mean of its divisors is an integer number (15620072066724).

Almost surely, 2^{31240144133447} is an apocalyptic number.

31240144133447 is a deficient number, since it is larger than the sum of its proper divisors (1).

31240144133447 is an equidigital number, since it uses as much as digits as its factorization.

31240144133447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 387072, while the sum is 41.

The spelling of 31240144133447 in words is "thirty-one trillion, two hundred forty billion, one hundred forty-four million, one hundred thirty-three thousand, four hundred forty-seven".