275555563 has 4 divisors (see below), whose sum is σ = 278396440. Its totient is φ = 272714688.

The previous prime is 275555551. The next prime is 275555569. The reversal of 275555563 is 365555572.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 275555563 - 2²¹ = 273458411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (275555569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1420293 + ... + 1420486.

It is an arithmetic number, because the mean of its divisors is an integer number (69599110).

Almost surely, 2^275555563 is an apocalyptic number.

275555563 is a deficient number, since it is larger than the sum of its proper divisors (2840877).

275555563 is an equidigital number, since it uses as much as digits as its factorization.

275555563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2840876.

The product of its digits is 787500, while the sum is 43.

The square root of 275555563 is about 16599.8663548837. The cubic root of 275555563 is about 650.7333443058.

Subtracting 275555563 from its reverse (365555572), we obtain a palindrome (90000009).

The spelling of 275555563 in words is "two hundred seventy-five million, five hundred fifty-five thousand, five hundred sixty-three".