31540043159 has 2 divisors, whose sum is σ = 31540043160. Its totient is φ = 31540043158.

The previous prime is 31540043137. The next prime is 31540043173. The reversal of 31540043159 is 95134004513.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31540043159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31540043189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15770021579 + 15770021580.

It is an arithmetic number, because the mean of its divisors is an integer number (15770021580).

Almost surely, 2^31540043159 is an apocalyptic number.

31540043159 is a deficient number, since it is larger than the sum of its proper divisors (1).

31540043159 is an equidigital number, since it uses as much as digits as its factorization.

31540043159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 35.

The spelling of 31540043159 in words is "thirty-one billion, five hundred forty million, forty-three thousand, one hundred fifty-nine".