51831893 has 2 divisors, whose sum is σ = 51831894. Its totient is φ = 51831892.

The previous prime is 51831889. The next prime is 51831911. The reversal of 51831893 is 39813815.

51831893 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., 26450449 + 25381444 = 5143^2 + 5038^2 .

It is a cyclic number.

It is not a de Polignac number, because 51831893 - 2² = 51831889 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51831193) 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, 25915946 + 25915947.

It is an arithmetic number, because the mean of its divisors is an integer number (25915947).

Almost surely, 2^51831893 is an apocalyptic number.

It is an amenable number.

51831893 is a deficient number, since it is larger than the sum of its proper divisors (1).

51831893 is an equidigital number, since it uses as much as digits as its factorization.

51831893 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The square root of 51831893 is about 7199.4369918765. The cubic root of 51831893 is about 372.8484627151.

The spelling of 51831893 in words is "fifty-one million, eight hundred thirty-one thousand, eight hundred ninety-three".