53513220402221 has 2 divisors, whose sum is σ = 53513220402222. Its totient is φ = 53513220402220.

The previous prime is 53513220402211. The next prime is 53513220402259. The reversal of 53513220402221 is 12220402231535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52489865610121 + 1023354792100 = 7244989^2 + 1011610^2 .

It is a cyclic number.

It is not a de Polignac number, because 53513220402221 - 2²² = 53513216207917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53513220402211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26756610201110 + 26756610201111.

It is an arithmetic number, because the mean of its divisors is an integer number (26756610201111).

Almost surely, 2^{53513220402221} is an apocalyptic number.

It is an amenable number.

53513220402221 is a deficient number, since it is larger than the sum of its proper divisors (1).

53513220402221 is an equidigital number, since it uses as much as digits as its factorization.

53513220402221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 32.

Adding to 53513220402221 its reverse (12220402231535), we get a palindrome (65733622633756).

The spelling of 53513220402221 in words is "fifty-three trillion, five hundred thirteen billion, two hundred twenty million, four hundred two thousand, two hundred twenty-one".