51642232 has 16 divisors (see below), whose sum is σ = 99446760. Its totient is φ = 25123104.

The previous prime is 51642229. The next prime is 51642233. The reversal of 51642232 is 23224615.

It is a junction number, because it is equal to n+sod(n) for n = 51642197 and 51642206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51642233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86938 + ... + 87529.

Almost surely, 2^51642232 is an apocalyptic number.

It is an amenable number.

51642232 is a deficient number, since it is larger than the sum of its proper divisors (47804528).

51642232 is a wasteful number, since it uses less digits than its factorization.

51642232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174510 (or 174506 counting only the distinct ones).

The product of its digits is 2880, while the sum is 25.

The square root of 51642232 is about 7186.2529874755. The cubic root of 51642232 is about 372.3931366205.

Adding to 51642232 its reverse (23224615), we get a palindrome (74866847).

It can be divided in two parts, 5164 and 2232, that added together give a square (7396 = 86²).

The spelling of 51642232 in words is "fifty-one million, six hundred forty-two thousand, two hundred thirty-two".