51018912 has 72 divisors (see below), whose sum is σ = 165818016. Its totient is φ = 14576256.

The previous prime is 51018907. The next prime is 51018943. The reversal of 51018912 is 21981015.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10638 + ... + 14669.

It is an arithmetic number, because the mean of its divisors is an integer number (2303028).

Almost surely, 2^51018912 is an apocalyptic number.

It is an amenable number.

51018912 is an abundant number, since it is smaller than the sum of its proper divisors (114799104).

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

51018912 is a wasteful number, since it uses less digits than its factorization.

51018912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25330 (or 25319 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 51018912 is about 7142.7524106608. The cubic root of 51018912 is about 370.8888103622. Note that the first 4 decimals are identical.

Adding to 51018912 its reverse (21981015), we get a palindrome (72999927).

The spelling of 51018912 in words is "fifty-one million, eighteen thousand, nine hundred twelve".