51312004 has 6 divisors (see below), whose sum is σ = 89796014. Its totient is φ = 25656000.

The previous prime is 51311993. The next prime is 51312031. The reversal of 51312004 is 40021315.

51312004 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 49984900 + 1327104 = 7070^2 + 1152^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6413997 + ... + 6414004.

Almost surely, 2^51312004 is an apocalyptic number.

It is an amenable number.

51312004 is a deficient number, since it is larger than the sum of its proper divisors (38484010).

51312004 is a wasteful number, since it uses less digits than its factorization.

51312004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12828005 (or 12828003 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 51312004 is about 7163.2397698248. The cubic root of 51312004 is about 371.5976785044.

Adding to 51312004 its reverse (40021315), we get a palindrome (91333319).

The spelling of 51312004 in words is "fifty-one million, three hundred twelve thousand, four".