51943457 has 2 divisors, whose sum is σ = 51943458. Its totient is φ = 51943456.

The previous prime is 51943447. The next prime is 51943459. The reversal of 51943457 is 75434915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49224256 + 2719201 = 7016^2 + 1649^2 .

It is a cyclic number.

It is not a de Polignac number, because 51943457 - 2⁶ = 51943393 is a prime.

It is a super-2 number, since 2×51943457² = 5396245450221698, which contains 22 as substring.

Together with 51943459, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51943457.

It is not a weakly prime, because it can be changed into another prime (51943459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25971728 + 25971729.

It is an arithmetic number, because the mean of its divisors is an integer number (25971729).

Almost surely, 2^51943457 is an apocalyptic number.

It is an amenable number.

51943457 is a deficient number, since it is larger than the sum of its proper divisors (1).

51943457 is an equidigital number, since it uses as much as digits as its factorization.

51943457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 51943457 is about 7207.1809329307. The cubic root of 51943457 is about 373.1157798357.

The spelling of 51943457 in words is "fifty-one million, nine hundred forty-three thousand, four hundred fifty-seven".