255552530521 has 2 divisors, whose sum is σ = 255552530522. Its totient is φ = 255552530520.

The previous prime is 255552530503. The next prime is 255552530531. The reversal of 255552530521 is 125035255552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146428675600 + 109123854921 = 382660^2 + 330339^2 .

It is a cyclic number.

It is not a de Polignac number, because 255552530521 - 2¹⁷ = 255552399449 is a prime.

It is not a weakly prime, because it can be changed into another prime (255552530531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127776265260 + 127776265261.

It is an arithmetic number, because the mean of its divisors is an integer number (127776265261).

Almost surely, 2^255552530521 is an apocalyptic number.

It is an amenable number.

255552530521 is a deficient number, since it is larger than the sum of its proper divisors (1).

255552530521 is an equidigital number, since it uses as much as digits as its factorization.

255552530521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 375000, while the sum is 40.

The spelling of 255552530521 in words is "two hundred fifty-five billion, five hundred fifty-two million, five hundred thirty thousand, five hundred twenty-one".