51228638 has 8 divisors (see below), whose sum is σ = 78145560. Its totient is φ = 25180120.

The previous prime is 51228623. The next prime is 51228643. The reversal of 51228638 is 83682215.

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

It is a junction number, because it is equal to n+sod(n) for n = 51228598 and 51228607.

It is a congruent number.

It is an unprimeable number.

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, 216953 + ... + 217188.

It is an arithmetic number, because the mean of its divisors is an integer number (9768195).

Almost surely, 2^51228638 is an apocalyptic number.

51228638 is a deficient number, since it is larger than the sum of its proper divisors (26916922).

51228638 is a wasteful number, since it uses less digits than its factorization.

51228638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434202.

The product of its digits is 23040, while the sum is 35.

The square root of 51228638 is about 7157.4183893356. The cubic root of 51228638 is about 371.3963259835.

The spelling of 51228638 in words is "fifty-one million, two hundred twenty-eight thousand, six hundred thirty-eight".