53443235032513 has 2 divisors, whose sum is σ = 53443235032514. Its totient is φ = 53443235032512.

The previous prime is 53443235032501. The next prime is 53443235032531. The reversal of 53443235032513 is 31523053234435.

Together with next prime (53443235032531) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50129062115344 + 3314172917169 = 7080188^2 + 1820487^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53443235032513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53443235032513.

It is not a weakly prime, because it can be changed into another prime (53443235032553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26721617516256 + 26721617516257.

It is an arithmetic number, because the mean of its divisors is an integer number (26721617516257).

Almost surely, 2^{53443235032513} is an apocalyptic number.

It is an amenable number.

53443235032513 is a deficient number, since it is larger than the sum of its proper divisors (1).

53443235032513 is an equidigital number, since it uses as much as digits as its factorization.

53443235032513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944000, while the sum is 43.

Adding to 53443235032513 its reverse (31523053234435), we get a palindrome (84966288266948).

The spelling of 53443235032513 in words is "fifty-three trillion, four hundred forty-three billion, two hundred thirty-five million, thirty-two thousand, five hundred thirteen".