51550232 has 8 divisors (see below), whose sum is σ = 96656700. Its totient is φ = 25775112.

The previous prime is 51550231. The next prime is 51550237. The reversal of 51550232 is 23205515.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 51550198 and 51550207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3221882 + ... + 3221897.

Almost surely, 2^51550232 is an apocalyptic number.

It is an amenable number.

51550232 is a deficient number, since it is larger than the sum of its proper divisors (45106468).

51550232 is a wasteful number, since it uses less digits than its factorization.

51550232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6443785 (or 6443781 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 51550232 is about 7179.8490234823. The cubic root of 51550232 is about 372.1718672441.

Adding to 51550232 its reverse (23205515), we get a palindrome (74755747).

The spelling of 51550232 in words is "fifty-one million, five hundred fifty thousand, two hundred thirty-two".