51382772 has 48 divisors (see below), whose sum is σ = 111081600. Its totient is φ = 20716416.

The previous prime is 51382763. The next prime is 51382787. The reversal of 51382772 is 27728315.

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, 22223 + ... + 24425.

It is an arithmetic number, because the mean of its divisors is an integer number (2314200).

Almost surely, 2^51382772 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 51382772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55540800).

51382772 is an abundant number, since it is smaller than the sum of its proper divisors (59698828).

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

51382772 is a wasteful number, since it uses less digits than its factorization.

51382772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245 (or 2229 counting only the distinct ones).

The product of its digits is 23520, while the sum is 35.

The square root of 51382772 is about 7168.1777321715. The cubic root of 51382772 is about 371.7684322090.

The spelling of 51382772 in words is "fifty-one million, three hundred eighty-two thousand, seven hundred seventy-two".