51380543 has 2 divisors, whose sum is σ = 51380544. Its totient is φ = 51380542.

The previous prime is 51380513. The next prime is 51380557. The reversal of 51380543 is 34508315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51380543 - 2¹² = 51376447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51380513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690271 + 25690272.

It is an arithmetic number, because the mean of its divisors is an integer number (25690272).

Almost surely, 2^51380543 is an apocalyptic number.

51380543 is a deficient number, since it is larger than the sum of its proper divisors (1).

51380543 is an equidigital number, since it uses as much as digits as its factorization.

51380543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 51380543 is about 7168.0222516396. The cubic root of 51380543 is about 371.7630563227.

Adding to 51380543 its reverse (34508315), we get a palindrome (85888858).

The spelling of 51380543 in words is "fifty-one million, three hundred eighty thousand, five hundred forty-three".