31540225097 has 2 divisors, whose sum is σ = 31540225098. Its totient is φ = 31540225096.

The previous prime is 31540225063. The next prime is 31540225099. The reversal of 31540225097 is 79052204513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17486359696 + 14053865401 = 132236^2 + 118549^2 .

It is a cyclic number.

It is not a de Polignac number, because 31540225097 - 2⁶ = 31540225033 is a prime.

Together with 31540225099, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31540225097.

It is not a weakly prime, because it can be changed into another prime (31540225099) 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, 15770112548 + 15770112549.

It is an arithmetic number, because the mean of its divisors is an integer number (15770112549).

Almost surely, 2^31540225097 is an apocalyptic number.

It is an amenable number.

31540225097 is a deficient number, since it is larger than the sum of its proper divisors (1).

31540225097 is an equidigital number, since it uses as much as digits as its factorization.

31540225097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 38.

The spelling of 31540225097 in words is "thirty-one billion, five hundred forty million, two hundred twenty-five thousand, ninety-seven".