51472764 has 72 divisors (see below), whose sum is σ = 149761248. Its totient is φ = 14601600.

The previous prime is 51472739. The next prime is 51472769. The reversal of 51472764 is 46727415.

51472764 is a `hidden beast` number, since 514 + 72 + 76 + 4 = 666.

51472764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (47040) is a multiple of the sum of its prime divisors (1470).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51472769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38914 + ... + 40214.

Almost surely, 2^51472764 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 51472764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74880624).

51472764 is an abundant number, since it is smaller than the sum of its proper divisors (98288484).

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

51472764 is a wasteful number, since it uses less digits than its factorization.

51472764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1475 (or 1470 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 51472764 is about 7174.4521742081. The cubic root of 51472764 is about 371.9853445492.

The spelling of 51472764 in words is "fifty-one million, four hundred seventy-two thousand, seven hundred sixty-four".