51693841 has 2 divisors, whose sum is σ = 51693842. Its totient is φ = 51693840.

The previous prime is 51693839. The next prime is 51693871. The reversal of 51693841 is 14839615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48790225 + 2903616 = 6985^2 + 1704^2 .

It is a cyclic number.

It is not a de Polignac number, because 51693841 - 2¹ = 51693839 is a prime.

Together with 51693839, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 51693841.

It is not a weakly prime, because it can be changed into another prime (51693871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25846920 + 25846921.

It is an arithmetic number, because the mean of its divisors is an integer number (25846921).

Almost surely, 2^51693841 is an apocalyptic number.

It is an amenable number.

51693841 is a deficient number, since it is larger than the sum of its proper divisors (1).

51693841 is an equidigital number, since it uses as much as digits as its factorization.

51693841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 37.

The square root of 51693841 is about 7189.8429050988. The cubic root of 51693841 is about 372.5171464864.

The spelling of 51693841 in words is "fifty-one million, six hundred ninety-three thousand, eight hundred forty-one".