52547981 has 2 divisors, whose sum is σ = 52547982. Its totient is φ = 52547980.

The previous prime is 52547959. The next prime is 52548011. The reversal of 52547981 is 18974525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32878756 + 19669225 = 5734^2 + 4435^2 .

It is a cyclic number.

It is not a de Polignac number, because 52547981 - 2¹⁰ = 52546957 is a prime.

It is a super-2 number, since 2×52547981² = 5522580614352722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52547921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26273990 + 26273991.

It is an arithmetic number, because the mean of its divisors is an integer number (26273991).

Almost surely, 2^52547981 is an apocalyptic number.

It is an amenable number.

52547981 is a deficient number, since it is larger than the sum of its proper divisors (1).

52547981 is an equidigital number, since it uses as much as digits as its factorization.

52547981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 41.

The square root of 52547981 is about 7248.9986204992. The cubic root of 52547981 is about 374.5576556075.

The spelling of 52547981 in words is "fifty-two million, five hundred forty-seven thousand, nine hundred eighty-one".