51321371 has 2 divisors, whose sum is σ = 51321372. Its totient is φ = 51321370.

The previous prime is 51321343. The next prime is 51321379. The reversal of 51321371 is 17312315.

51321371 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51321371 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51321379) 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, 25660685 + 25660686.

It is an arithmetic number, because the mean of its divisors is an integer number (25660686).

Almost surely, 2^51321371 is an apocalyptic number.

51321371 is a deficient number, since it is larger than the sum of its proper divisors (1).

51321371 is an equidigital number, since it uses as much as digits as its factorization.

51321371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 23.

The square root of 51321371 is about 7163.8935642568. The cubic root of 51321371 is about 371.6202888321.

Adding to 51321371 its reverse (17312315), we get a palindrome (68633686).

The spelling of 51321371 in words is "fifty-one million, three hundred twenty-one thousand, three hundred seventy-one".