31440144079 has 2 divisors, whose sum is σ = 31440144080. Its totient is φ = 31440144078.

The previous prime is 31440144049. The next prime is 31440144091. The reversal of 31440144079 is 97044104413.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31440144079 - 2¹³ = 31440135887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31440144049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15720072039 + 15720072040.

It is an arithmetic number, because the mean of its divisors is an integer number (15720072040).

Almost surely, 2^31440144079 is an apocalyptic number.

31440144079 is a deficient number, since it is larger than the sum of its proper divisors (1).

31440144079 is an equidigital number, since it uses as much as digits as its factorization.

31440144079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 31440144079 in words is "thirty-one billion, four hundred forty million, one hundred forty-four thousand, seventy-nine".