51780343 has 2 divisors, whose sum is σ = 51780344. Its totient is φ = 51780342.

The previous prime is 51780271. The next prime is 51780349. The reversal of 51780343 is 34308715.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51780343 - 2¹⁷ = 51649271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51780349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25890171 + 25890172.

It is an arithmetic number, because the mean of its divisors is an integer number (25890172).

Almost surely, 2^51780343 is an apocalyptic number.

51780343 is a deficient number, since it is larger than the sum of its proper divisors (1).

51780343 is an equidigital number, since it uses as much as digits as its factorization.

51780343 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 51780343 is about 7195.8559602038. The cubic root of 51780343 is about 372.7248148180.

The spelling of 51780343 in words is "fifty-one million, seven hundred eighty thousand, three hundred forty-three".