51886189 has 2 divisors, whose sum is σ = 51886190. Its totient is φ = 51886188.

The previous prime is 51886187. The next prime is 51886201. The reversal of 51886189 is 98168815.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29484900 + 22401289 = 5430^2 + 4733^2 .

It is a cyclic number.

It is not a de Polignac number, because 51886189 - 2¹ = 51886187 is a prime.

Together with 51886187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51886181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25943094 + 25943095.

It is an arithmetic number, because the mean of its divisors is an integer number (25943095).

Almost surely, 2^51886189 is an apocalyptic number.

It is an amenable number.

51886189 is a deficient number, since it is larger than the sum of its proper divisors (1).

51886189 is an equidigital number, since it uses as much as digits as its factorization.

51886189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 46.

The square root of 51886189 is about 7203.2068552833. The cubic root of 51886189 is about 372.9786085526.

The spelling of 51886189 in words is "fifty-one million, eight hundred eighty-six thousand, one hundred eighty-nine".