51008136 has 16 divisors (see below), whose sum is σ = 127520400. Its totient is φ = 17002704.

The previous prime is 51008117. The next prime is 51008137. The reversal of 51008136 is 63180015.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 2125339 = 51008136 / (5 + 1 + 0 + 0 + 8 + 1 + 3 + 6).

It is not an unprimeable number, because it can be changed into a prime (51008137) 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, 1062646 + ... + 1062693.

It is an arithmetic number, because the mean of its divisors is an integer number (7970025).

Almost surely, 2^51008136 is an apocalyptic number.

It is an amenable number.

51008136 is an abundant number, since it is smaller than the sum of its proper divisors (76512264).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51008136 is a wasteful number, since it uses less digits than its factorization.

51008136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2125348 (or 2125344 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 51008136 is about 7141.9980397645. The cubic root of 51008136 is about 370.8626959987.

The spelling of 51008136 in words is "fifty-one million, eight thousand, one hundred thirty-six".