52686281 has 4 divisors (see below), whose sum is σ = 55785492. Its totient is φ = 49587072.

The previous prime is 52686269. The next prime is 52686287. The reversal of 52686281 is 18268625.

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 37319881 + 15366400 = 6109^2 + 3920^2 .

It is a cyclic number.

It is not a de Polignac number, because 52686281 - 2²² = 48491977 is a prime.

It is a super-2 number, since 2×52686281² = 5551688411221922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (52686287) 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, 1549580 + ... + 1549613.

It is an arithmetic number, because the mean of its divisors is an integer number (13946373).

Almost surely, 2^52686281 is an apocalyptic number.

It is an amenable number.

52686281 is a deficient number, since it is larger than the sum of its proper divisors (3099211).

52686281 is a wasteful number, since it uses less digits than its factorization.

52686281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3099210.

The product of its digits is 46080, while the sum is 38.

The square root of 52686281 is about 7258.5316008129. The cubic root of 52686281 is about 374.8859647335.

The spelling of 52686281 in words is "fifty-two million, six hundred eighty-six thousand, two hundred eighty-one".