31444540097 has 2 divisors, whose sum is σ = 31444540098. Its totient is φ = 31444540096.

The previous prime is 31444540079. The next prime is 31444540109. The reversal of 31444540097 is 79004544413.

Together with previous prime (31444540079) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31398422416 + 46117681 = 177196^2 + 6791^2 .

It is an emirp because it is prime and its reverse (79004544413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31444540097 - 2⁶ = 31444540033 is a prime.

It is not a weakly prime, because it can be changed into another prime (31444540027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15722270048 + 15722270049.

It is an arithmetic number, because the mean of its divisors is an integer number (15722270049).

Almost surely, 2^31444540097 is an apocalyptic number.

It is an amenable number.

31444540097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31444540097 is an equidigital number, since it uses as much as digits as its factorization.

31444540097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 41.

The spelling of 31444540097 in words is "thirty-one billion, four hundred forty-four million, five hundred forty thousand, ninety-seven".