555281 has 4 divisors (see below), whose sum is σ = 565812. Its totient is φ = 544752.

The previous prime is 555277. The next prime is 555287. The reversal of 555281 is 182555.

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

It can be written as a sum of positive squares in 2 ways, for example, as 410881 + 144400 = 641^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 555281 - 2² = 555277 is a prime.

It is a super-2 number, since 2×555281² = 616673977922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 555281.

It is not an unprimeable number, because it can be changed into a prime (555287) 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, 5186 + ... + 5291.

It is an arithmetic number, because the mean of its divisors is an integer number (141453).

2⁵⁵⁵²⁸¹ is an apocalyptic number.

It is an amenable number.

555281 is a deficient number, since it is larger than the sum of its proper divisors (10531).

555281 is a wasteful number, since it uses less digits than its factorization.

555281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10530.

The product of its digits is 2000, while the sum is 26.

The square root of 555281 is about 745.1717922734. The cubic root of 555281 is about 82.1935246684.

The spelling of 555281 in words is "five hundred fifty-five thousand, two hundred eighty-one".