31540043959 has 2 divisors, whose sum is σ = 31540043960. Its totient is φ = 31540043958.

The previous prime is 31540043933. The next prime is 31540044017. The reversal of 31540043959 is 95934004513.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (95934004513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31540043959 - 2⁷ = 31540043831 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31540043159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15770021979 + 15770021980.

It is an arithmetic number, because the mean of its divisors is an integer number (15770021980).

Almost surely, 2^31540043959 is an apocalyptic number.

31540043959 is a deficient number, since it is larger than the sum of its proper divisors (1).

31540043959 is an equidigital number, since it uses as much as digits as its factorization.

31540043959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 31540043959 in words is "thirty-one billion, five hundred forty million, forty-three thousand, nine hundred fifty-nine".