51630238 has 8 divisors (see below), whose sum is σ = 84485880. Its totient is φ = 23468280.

The previous prime is 51630211. The next prime is 51630253. The reversal of 51630238 is 83203615.

51630238 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 an unprimeable number.

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, 1173393 + ... + 1173436.

It is an arithmetic number, because the mean of its divisors is an integer number (10560735).

Almost surely, 2^51630238 is an apocalyptic number.

51630238 is a deficient number, since it is larger than the sum of its proper divisors (32855642).

51630238 is a wasteful number, since it uses less digits than its factorization.

51630238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2346842.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 51630238 is about 7185.4184290130. The cubic root of 51630238 is about 372.3643047328.

The spelling of 51630238 in words is "fifty-one million, six hundred thirty thousand, two hundred thirty-eight".