51321343 has 2 divisors, whose sum is σ = 51321344. Its totient is φ = 51321342.

The previous prime is 51321311. The next prime is 51321371. The reversal of 51321343 is 34312315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51321343 - 2⁵ = 51321311 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51321383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25660671 + 25660672.

It is an arithmetic number, because the mean of its divisors is an integer number (25660672).

Almost surely, 2^51321343 is an apocalyptic number.

51321343 is a deficient number, since it is larger than the sum of its proper divisors (1).

51321343 is an equidigital number, since it uses as much as digits as its factorization.

51321343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 22.

The square root of 51321343 is about 7163.8916100120. The cubic root of 51321343 is about 371.6202212490.

Adding to 51321343 its reverse (34312315), we get a palindrome (85633658).

Subtracting from 51321343 its reverse (34312315), we obtain a triangular number (17009028 = T₅₈₃₂).

The spelling of 51321343 in words is "fifty-one million, three hundred twenty-one thousand, three hundred forty-three".