51219638 has 8 divisors (see below), whose sum is σ = 76955832. Its totient is φ = 25567696.

The previous prime is 51219631. The next prime is 51219659. The reversal of 51219638 is 83691215.

51219638 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 Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 51219598 and 51219607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51219631) 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, 19520 + ... + 21987.

It is an arithmetic number, because the mean of its divisors is an integer number (9619479).

Almost surely, 2^51219638 is an apocalyptic number.

51219638 is a deficient number, since it is larger than the sum of its proper divisors (25736194).

51219638 is a wasteful number, since it uses less digits than its factorization.

51219638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42126.

The product of its digits is 12960, while the sum is 35.

The square root of 51219638 is about 7156.7896434086. The cubic root of 51219638 is about 371.3745753714.

The spelling of 51219638 in words is "fifty-one million, two hundred nineteen thousand, six hundred thirty-eight".