53512221517 has 2 divisors, whose sum is σ = 53512221518. Its totient is φ = 53512221516.

The previous prime is 53512221439. The next prime is 53512221541. The reversal of 53512221517 is 71512221535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43904497156 + 9607724361 = 209534^2 + 98019^2 .

It is a cyclic number.

It is not a de Polignac number, because 53512221517 - 2¹¹ = 53512219469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53512221317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26756110758 + 26756110759.

It is an arithmetic number, because the mean of its divisors is an integer number (26756110759).

Almost surely, 2^53512221517 is an apocalyptic number.

It is an amenable number.

53512221517 is a deficient number, since it is larger than the sum of its proper divisors (1).

53512221517 is an equidigital number, since it uses as much as digits as its factorization.

53512221517 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21000, while the sum is 34.

The spelling of 53512221517 in words is "fifty-three billion, five hundred twelve million, two hundred twenty-one thousand, five hundred seventeen".