51853812 has 48 divisors (see below), whose sum is σ = 127895040. Its totient is φ = 16306272.

The previous prime is 51853787. The next prime is 51853849. The reversal of 51853812 is 21835815.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106233 + ... + 106719.

It is an arithmetic number, because the mean of its divisors is an integer number (2664480).

Almost surely, 2^51853812 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51853812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63947520).

51853812 is an abundant number, since it is smaller than the sum of its proper divisors (76041228).

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

51853812 is a wasteful number, since it uses less digits than its factorization.

51853812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 980 (or 978 counting only the distinct ones).

The product of its digits is 9600, while the sum is 33.

The square root of 51853812 is about 7200.9591027862. The cubic root of 51853812 is about 372.9010128166.

The spelling of 51853812 in words is "fifty-one million, eight hundred fifty-three thousand, eight hundred twelve".