31143032399 has 2 divisors, whose sum is σ = 31143032400. Its totient is φ = 31143032398.

The previous prime is 31143032363. The next prime is 31143032471. The reversal of 31143032399 is 99323034113.

It is a weak prime.

It is an emirp because it is prime and its reverse (99323034113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31143032399 - 2²⁰ = 31141983823 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31143031399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15571516199 + 15571516200.

It is an arithmetic number, because the mean of its divisors is an integer number (15571516200).

Almost surely, 2^31143032399 is an apocalyptic number.

31143032399 is a deficient number, since it is larger than the sum of its proper divisors (1).

31143032399 is an equidigital number, since it uses as much as digits as its factorization.

31143032399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52488, while the sum is 38.

The spelling of 31143032399 in words is "thirty-one billion, one hundred forty-three million, thirty-two thousand, three hundred ninety-nine".