52775281 has 4 divisors (see below), whose sum is σ = 56834932. Its totient is φ = 48715632.

The previous prime is 52775279. The next prime is 52775287. The reversal of 52775281 is 18257725.

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 25160256 + 27615025 = 5016^2 + 5255^2 .

It is a cyclic number.

It is not a de Polignac number, because 52775281 - 2¹ = 52775279 is a prime.

It is a super-2 number, since 2×52775281² = 5570460569257922, 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 52775281.

It is not an unprimeable number, because it can be changed into a prime (52775287) 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, 2029806 + ... + 2029831.

It is an arithmetic number, because the mean of its divisors is an integer number (14208733).

Almost surely, 2^52775281 is an apocalyptic number.

It is an amenable number.

52775281 is a deficient number, since it is larger than the sum of its proper divisors (4059651).

52775281 is a wasteful number, since it uses less digits than its factorization.

52775281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4059650.

The product of its digits is 39200, while the sum is 37.

The square root of 52775281 is about 7264.6597305036. The cubic root of 52775281 is about 375.0969373100.

The spelling of 52775281 in words is "fifty-two million, seven hundred seventy-five thousand, two hundred eighty-one".