51324551 has 4 divisors (see below), whose sum is σ = 52047504. Its totient is φ = 50601600.

The previous prime is 51324521. The next prime is 51324571. The reversal of 51324551 is 15542315.

51324551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51324551 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51324551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51324521) 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 in 3 ways as a sum of consecutive naturals, for example, 361370 + ... + 361511.

It is an arithmetic number, because the mean of its divisors is an integer number (13011876).

Almost surely, 2^51324551 is an apocalyptic number.

51324551 is a deficient number, since it is larger than the sum of its proper divisors (722953).

51324551 is an equidigital number, since it uses as much as digits as its factorization.

51324551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722952.

The product of its digits is 3000, while the sum is 26.

The square root of 51324551 is about 7164.1155071649. The cubic root of 51324551 is about 371.6279641799.

Adding to 51324551 its reverse (15542315), we get a palindrome (66866866).

The spelling of 51324551 in words is "fifty-one million, three hundred twenty-four thousand, five hundred fifty-one".