51189638 has 8 divisors (see below), whose sum is σ = 76842480. Its totient is φ = 25575480.

The previous prime is 51189631. The next prime is 51189647. The reversal of 51189638 is 83698115.

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 = 51189595 and 51189604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51189631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6098 + ... + 11813.

It is an arithmetic number, because the mean of its divisors is an integer number (9605310).

Almost surely, 2^51189638 is an apocalyptic number.

51189638 is a deficient number, since it is larger than the sum of its proper divisors (25652842).

51189638 is a wasteful number, since it uses less digits than its factorization.

51189638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19342.

The product of its digits is 51840, while the sum is 41.

The square root of 51189638 is about 7154.6934245990. The cubic root of 51189638 is about 371.3020549242.

The spelling of 51189638 in words is "fifty-one million, one hundred eighty-nine thousand, six hundred thirty-eight".