51630142 has 8 divisors (see below), whose sum is σ = 77499000. Its totient is φ = 25797144.

The previous prime is 51630091. The next prime is 51630149. The reversal of 51630142 is 24103615.

51630142 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51630149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5017 + ... + 11332.

It is an arithmetic number, because the mean of its divisors is an integer number (9687375).

Almost surely, 2^51630142 is an apocalyptic number.

51630142 is a deficient number, since it is larger than the sum of its proper divisors (25868858).

51630142 is a wasteful number, since it uses less digits than its factorization.

51630142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17930.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 51630142 is about 7185.4117488144. The cubic root of 51630142 is about 372.3640739443.

Adding to 51630142 its reverse (24103615), we get a palindrome (75733757).

The spelling of 51630142 in words is "fifty-one million, six hundred thirty thousand, one hundred forty-two".