51320512 has 14 divisors (see below), whose sum is σ = 101839268. Its totient is φ = 25660224.

The previous prime is 51320509. The next prime is 51320513. The reversal of 51320512 is 21502315.

It is a self number, because there is not a number n which added to its sum of digits gives 51320512.

It is not an unprimeable number, because it can be changed into a prime (51320513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400878 + ... + 401005.

Almost surely, 2^51320512 is an apocalyptic number.

It is an amenable number.

51320512 is a deficient number, since it is larger than the sum of its proper divisors (50518756).

51320512 is an equidigital number, since it uses as much as digits as its factorization.

51320512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801895 (or 801885 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 51320512 is about 7163.8336105747. The cubic root of 51320512 is about 371.6182154684.

Adding to 51320512 its reverse (21502315), we get a palindrome (72822827).

It can be divided in two parts, 513 and 20512, that added together give a square (21025 = 145²).

The spelling of 51320512 in words is "fifty-one million, three hundred twenty thousand, five hundred twelve".