51006504 has 32 divisors (see below), whose sum is σ = 127761120. Its totient is φ = 16969536.

The previous prime is 51006493. The next prime is 51006509. The reversal of 51006504 is 40560015.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (51006509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12979 + ... + 16445.

It is an arithmetic number, because the mean of its divisors is an integer number (3992535).

Almost surely, 2^51006504 is an apocalyptic number.

It is an amenable number.

51006504 is an abundant number, since it is smaller than the sum of its proper divisors (76754616).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51006504 is a wasteful number, since it uses less digits than its factorization.

51006504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4089 (or 4085 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51006504 is about 7141.8837851088. The cubic root of 51006504 is about 370.8587407188.

Adding to 51006504 its reverse (40560015), we get a palindrome (91566519).

The spelling of 51006504 in words is "fifty-one million, six thousand, five hundred four".