52013981 has 2 divisors, whose sum is σ = 52013982. Its totient is φ = 52013980.

The previous prime is 52013957. The next prime is 52013989. The reversal of 52013981 is 18931025.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50993881 + 1020100 = 7141^2 + 1010^2 .

It is a cyclic number.

It is not a de Polignac number, because 52013981 - 2⁶ = 52013917 is a prime.

It is a super-3 number, since 3×52013981³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52013989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26006990 + 26006991.

It is an arithmetic number, because the mean of its divisors is an integer number (26006991).

Almost surely, 2^52013981 is an apocalyptic number.

It is an amenable number.

52013981 is a deficient number, since it is larger than the sum of its proper divisors (1).

52013981 is an equidigital number, since it uses as much as digits as its factorization.

52013981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 52013981 is about 7212.0718937071. The cubic root of 52013981 is about 373.2845641191.

The spelling of 52013981 in words is "fifty-two million, thirteen thousand, nine hundred eighty-one".