31524404142013 has 2 divisors, whose sum is σ = 31524404142014. Its totient is φ = 31524404142012.

The previous prime is 31524404141969. The next prime is 31524404142053. The reversal of 31524404142013 is 31024140442513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30224683299204 + 1299720842809 = 5497698^2 + 1140053^2 .

It is an emirp because it is prime and its reverse (31024140442513) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31524404142013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31524404142013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31524404142053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15762202071006 + 15762202071007.

It is an arithmetic number, because the mean of its divisors is an integer number (15762202071007).

Almost surely, 2^{31524404142013} is an apocalyptic number.

It is an amenable number.

31524404142013 is a deficient number, since it is larger than the sum of its proper divisors (1).

31524404142013 is an equidigital number, since it uses as much as digits as its factorization.

31524404142013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 46080, while the sum is 34.

Adding to 31524404142013 its reverse (31024140442513), we get a palindrome (62548544584526).

The spelling of 31524404142013 in words is "thirty-one trillion, five hundred twenty-four billion, four hundred four million, one hundred forty-two thousand, thirteen".