31241523041921 has 2 divisors, whose sum is σ = 31241523041922. Its totient is φ = 31241523041920.

The previous prime is 31241523041881. The next prime is 31241523041947. The reversal of 31241523041921 is 12914032514213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21113694161296 + 10127828880625 = 4594964^2 + 3182425^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31241523041921 is a prime.

It is not a weakly prime, because it can be changed into another prime (31241523041621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15620761520960 + 15620761520961.

It is an arithmetic number, because the mean of its divisors is an integer number (15620761520961).

Almost surely, 2^{31241523041921} is an apocalyptic number.

It is an amenable number.

31241523041921 is a deficient number, since it is larger than the sum of its proper divisors (1).

31241523041921 is an equidigital number, since it uses as much as digits as its factorization.

31241523041921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 31241523041921 in words is "thirty-one trillion, two hundred forty-one billion, five hundred twenty-three million, forty-one thousand, nine hundred twenty-one".