51500424 has 32 divisors (see below), whose sum is σ = 132906240. Its totient is φ = 16612800.

The previous prime is 51500419. The next prime is 51500441. The reversal of 51500424 is 42400515.

It is a self number, because there is not a number n which added to its sum of digits gives 51500424.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 33867 + ... + 35354.

It is an arithmetic number, because the mean of its divisors is an integer number (4153320).

Almost surely, 2^51500424 is an apocalyptic number.

It is an amenable number.

51500424 is an abundant number, since it is smaller than the sum of its proper divisors (81405816).

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

51500424 is a wasteful number, since it uses less digits than its factorization.

51500424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69261 (or 69257 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 51500424 is about 7176.3795886227. The cubic root of 51500424 is about 372.0519640671.

Adding to 51500424 its reverse (42400515), we get a palindrome (93900939).

Subtracting from 51500424 its reverse (42400515), we obtain a palindrome (9099909).

The spelling of 51500424 in words is "fifty-one million, five hundred thousand, four hundred twenty-four".