31523542052549 has 2 divisors, whose sum is σ = 31523542052550. Its totient is φ = 31523542052548.

The previous prime is 31523542052501. The next prime is 31523542052551. The reversal of 31523542052549 is 94525024532513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24559775231524 + 6963766821025 = 4955782^2 + 2638895^2 .

It is a cyclic number.

It is not a de Polignac number, because 31523542052549 - 2²⁸ = 31523273617093 is a prime.

Together with 31523542052551, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 31523542052497 and 31523542052506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31523542055549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15761771026274 + 15761771026275.

It is an arithmetic number, because the mean of its divisors is an integer number (15761771026275).

Almost surely, 2^{31523542052549} is an apocalyptic number.

It is an amenable number.

31523542052549 is a deficient number, since it is larger than the sum of its proper divisors (1).

31523542052549 is an equidigital number, since it uses as much as digits as its factorization.

31523542052549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480000, while the sum is 50.

The spelling of 31523542052549 in words is "thirty-one trillion, five hundred twenty-three billion, five hundred forty-two million, fifty-two thousand, five hundred forty-nine".