31543552051537 has 2 divisors, whose sum is σ = 31543552051538. Its totient is φ = 31543552051536.

The previous prime is 31543552051513. The next prime is 31543552051559. The reversal of 31543552051537 is 73515025534513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31214166737296 + 329385314241 = 5586964^2 + 573921^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31543552051537 is a prime.

It is not a weakly prime, because it can be changed into another prime (31543552051937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15771776025768 + 15771776025769.

It is an arithmetic number, because the mean of its divisors is an integer number (15771776025769).

Almost surely, 2^{31543552051537} is an apocalyptic number.

It is an amenable number.

31543552051537 is a deficient number, since it is larger than the sum of its proper divisors (1).

31543552051537 is an equidigital number, since it uses as much as digits as its factorization.

31543552051537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4725000, while the sum is 49.

The spelling of 31543552051537 in words is "thirty-one trillion, five hundred forty-three billion, five hundred fifty-two million, fifty-one thousand, five hundred thirty-seven".