51322872 has 64 divisors (see below), whose sum is σ = 132295680. Its totient is φ = 16583552.

The previous prime is 51322853. The next prime is 51322877. The reversal of 51322872 is 27822315.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51322877) 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, 195013 + ... + 195275.

It is an arithmetic number, because the mean of its divisors is an integer number (2067120).

Almost surely, 2^51322872 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 51322872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66147840).

51322872 is an abundant number, since it is smaller than the sum of its proper divisors (80972808).

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

51322872 is a wasteful number, since it uses less digits than its factorization.

51322872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 488 counting only the distinct ones).

The product of its digits is 6720, while the sum is 30.

The square root of 51322872 is about 7163.9983249579. The cubic root of 51322872 is about 371.6239117323.

The spelling of 51322872 in words is "fifty-one million, three hundred twenty-two thousand, eight hundred seventy-two".