275505521 has 2 divisors, whose sum is σ = 275505522. Its totient is φ = 275505520.

The previous prime is 275505509. The next prime is 275505547. The reversal of 275505521 is 125505572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 141871921 + 133633600 = 11911^2 + 11560^2 .

It is a cyclic number.

It is not a de Polignac number, because 275505521 - 2¹⁰ = 275504497 is a prime.

It is not a weakly prime, because it can be changed into another prime (275505551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137752760 + 137752761.

It is an arithmetic number, because the mean of its divisors is an integer number (137752761).

Almost surely, 2^275505521 is an apocalyptic number.

It is an amenable number.

275505521 is a deficient number, since it is larger than the sum of its proper divisors (1).

275505521 is an equidigital number, since it uses as much as digits as its factorization.

275505521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17500, while the sum is 32.

The square root of 275505521 is about 16598.3589851527. The cubic root of 275505521 is about 650.6939499889.

The spelling of 275505521 in words is "two hundred seventy-five million, five hundred five thousand, five hundred twenty-one".