52581 has 8 divisors (see below), whose sum is σ = 74304. Its totient is φ = 32960.

The previous prime is 52579. The next prime is 52583. The reversal of 52581 is 18525.

52581 = T₇₀ + T₇₁ + ... + T₈₆.

It is an interprime number because it is at equal distance from previous prime (52579) and next prime (52583).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 52581 - 2¹ = 52579 is a prime.

It is a super-2 number, since 2×52581² = 5529523122, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465 + ... + 566.

It is an arithmetic number, because the mean of its divisors is an integer number (9288).

2⁵²⁵⁸¹ is an apocalyptic number.

52581 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

52581 is a deficient number, since it is larger than the sum of its proper divisors (21723).

52581 is a wasteful number, since it uses less digits than its factorization.

52581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051.

The product of its digits is 400, while the sum is 21.

The square root of 52581 is about 229.3054731139. The cubic root of 52581 is about 37.4636091413.

It can be divided in two parts, 525 and 81, that added together give a palindrome (606).

The spelling of 52581 in words is "fifty-two thousand, five hundred eighty-one".