525736054613221 has 2 divisors, whose sum is σ = 525736054613222. Its totient is φ = 525736054613220.

The previous prime is 525736054613219. The next prime is 525736054613279. The reversal of 525736054613221 is 122316450637525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 500483520077121 + 25252534536100 = 22371489^2 + 5025190^2 .

It is a cyclic number.

It is not a de Polignac number, because 525736054613221 - 2¹ = 525736054613219 is a prime.

Together with 525736054613219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525736054616221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262868027306610 + 262868027306611.

It is an arithmetic number, because the mean of its divisors is an integer number (262868027306611).

Almost surely, 2^{525736054613221} is an apocalyptic number.

It is an amenable number.

525736054613221 is a deficient number, since it is larger than the sum of its proper divisors (1).

525736054613221 is an equidigital number, since it uses as much as digits as its factorization.

525736054613221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072000, while the sum is 52.

The spelling of 525736054613221 in words is "five hundred twenty-five trillion, seven hundred thirty-six billion, fifty-four million, six hundred thirteen thousand, two hundred twenty-one".