52981 has 2 divisors, whose sum is σ = 52982. Its totient is φ = 52980.

The previous prime is 52973. The next prime is 52999. The reversal of 52981 is 18925.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52900 + 81 = 230^2 + 9^2 .

It is a cyclic number.

It is not a de Polignac number, because 52981 - 2³ = 52973 is a prime.

It is a super-2 number, since 2×52981² = 5613972722, 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 a weakly prime, because it can be changed into another prime (52901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26490 + 26491.

It is an arithmetic number, because the mean of its divisors is an integer number (26491).

2⁵²⁹⁸¹ is an apocalyptic number.

It is an amenable number.

52981 is a deficient number, since it is larger than the sum of its proper divisors (1).

52981 is an equidigital number, since it uses as much as digits as its factorization.

52981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 25.

The square root of 52981 is about 230.1760196024. The cubic root of 52981 is about 37.5583683624.

It can be divided in two parts, 529 and 81, that multiplied together give a square (42849 = 207²).

The spelling of 52981 in words is "fifty-two thousand, nine hundred eighty-one".