31544233139 has 2 divisors, whose sum is σ = 31544233140. Its totient is φ = 31544233138.

The previous prime is 31544233129. The next prime is 31544233141. The reversal of 31544233139 is 93133244513.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31544233139 - 2⁸ = 31544232883 is a prime.

Together with 31544233141, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31544233129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15772116569 + 15772116570.

It is an arithmetic number, because the mean of its divisors is an integer number (15772116570).

Almost surely, 2^31544233139 is an apocalyptic number.

31544233139 is a deficient number, since it is larger than the sum of its proper divisors (1).

31544233139 is an equidigital number, since it uses as much as digits as its factorization.

31544233139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 116640, while the sum is 38.

The spelling of 31544233139 in words is "thirty-one billion, five hundred forty-four million, two hundred thirty-three thousand, one hundred thirty-nine".