51320504 has 16 divisors (see below), whose sum is σ = 97582320. Its totient is φ = 25298560.

The previous prime is 51320497. The next prime is 51320509. The reversal of 51320504 is 40502315.

51320504 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51320509) 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, 44609 + ... + 45744.

It is an arithmetic number, because the mean of its divisors is an integer number (6098895).

Almost surely, 2^51320504 is an apocalyptic number.

It is an amenable number.

51320504 is a deficient number, since it is larger than the sum of its proper divisors (46261816).

51320504 is a wasteful number, since it uses less digits than its factorization.

51320504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90430 (or 90426 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 51320504 is about 7163.8330522144. The cubic root of 51320504 is about 371.6181961587.

Adding to 51320504 its reverse (40502315), we get a palindrome (91822819).

The spelling of 51320504 in words is "fifty-one million, three hundred twenty thousand, five hundred four".