51550424 has 32 divisors (see below), whose sum is σ = 99090000. Its totient is φ = 25133952.

The previous prime is 51550417. The next prime is 51550469. The reversal of 51550424 is 42405515.

It is a junction number, because it is equal to n+sod(n) for n = 51550393 and 51550402.

It is a congruent number.

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, 69962 + ... + 70694.

Almost surely, 2^51550424 is an apocalyptic number.

It is an amenable number.

51550424 is a deficient number, since it is larger than the sum of its proper divisors (47539576).

51550424 is a wasteful number, since it uses less digits than its factorization.

51550424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947 (or 943 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 51550424 is about 7179.8623942246. The cubic root of 51550424 is about 372.1723292977.

Adding to 51550424 its reverse (42405515), we get a palindrome (93955939).

The spelling of 51550424 in words is "fifty-one million, five hundred fifty thousand, four hundred twenty-four".