51382812 has 48 divisors (see below), whose sum is σ = 129773952. Its totient is φ = 15729600.

The previous prime is 51382787. The next prime is 51382813. The reversal of 51382812 is 21828315.

It is a self number, because there is not a number n which added to its sum of digits gives 51382812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51382813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34687 + ... + 36137.

It is an arithmetic number, because the mean of its divisors is an integer number (2703624).

Almost surely, 2^51382812 is an apocalyptic number.

51382812 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51382812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64886976).

51382812 is an abundant number, since it is smaller than the sum of its proper divisors (78391140).

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

51382812 is a wasteful number, since it uses less digits than its factorization.

51382812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698 (or 1696 counting only the distinct ones).

The product of its digits is 3840, while the sum is 30.

The square root of 51382812 is about 7168.1805222804. The cubic root of 51382812 is about 371.7685286793.

The spelling of 51382812 in words is "fifty-one million, three hundred eighty-two thousand, eight hundred twelve".