31139543299 has 2 divisors, whose sum is σ = 31139543300. Its totient is φ = 31139543298.

The previous prime is 31139543273. The next prime is 31139543311. The reversal of 31139543299 is 99234593113.

It is a strong prime.

It is an emirp because it is prime and its reverse (99234593113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31139543299 - 2¹³ = 31139535107 is a prime.

It is not a weakly prime, because it can be changed into another prime (31139543599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15569771649 + 15569771650.

It is an arithmetic number, because the mean of its divisors is an integer number (15569771650).

Almost surely, 2^31139543299 is an apocalyptic number.

31139543299 is a deficient number, since it is larger than the sum of its proper divisors (1).

31139543299 is an equidigital number, since it uses as much as digits as its factorization.

31139543299 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 787320, while the sum is 49.

The spelling of 31139543299 in words is "thirty-one billion, one hundred thirty-nine million, five hundred forty-three thousand, two hundred ninety-nine".