52187381 has 2 divisors, whose sum is σ = 52187382. Its totient is φ = 52187380.

The previous prime is 52187371. The next prime is 52187413. The reversal of 52187381 is 18378125.

52187381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51051025 + 1136356 = 7145^2 + 1066^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-52187381 is a prime.

It is a super-2 number, since 2×52187381² = 5447045471278322, 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 (52187341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26093690 + 26093691.

It is an arithmetic number, because the mean of its divisors is an integer number (26093691).

Almost surely, 2^52187381 is an apocalyptic number.

It is an amenable number.

52187381 is a deficient number, since it is larger than the sum of its proper divisors (1).

52187381 is an equidigital number, since it uses as much as digits as its factorization.

52187381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 52187381 is about 7224.0834020656. The cubic root of 52187381 is about 373.6989126416.

The spelling of 52187381 in words is "fifty-two million, one hundred eighty-seven thousand, three hundred eighty-one".