51406504 has 32 divisors (see below), whose sum is σ = 102643200. Its totient is φ = 24052480.

The previous prime is 51406501. The next prime is 51406519. The reversal of 51406504 is 40560415.

It is not an unprimeable number, because it can be changed into a prime (51406501) 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, 24987 + ... + 26965.

It is an arithmetic number, because the mean of its divisors is an integer number (3207600).

Almost surely, 2^51406504 is an apocalyptic number.

It is an amenable number.

51406504 is a deficient number, since it is larger than the sum of its proper divisors (51236696).

51406504 is a wasteful number, since it uses less digits than its factorization.

51406504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2193 (or 2189 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 51406504 is about 7169.8329129764. The cubic root of 51406504 is about 371.8256592400.

Adding to 51406504 its reverse (40560415), we get a palindrome (91966919).

The spelling of 51406504 in words is "fifty-one million, four hundred six thousand, five hundred four".