51047472 has 80 divisors (see below), whose sum is σ = 151934720. Its totient is φ = 14466816.

The previous prime is 51047467. The next prime is 51047473. The reversal of 51047472 is 27474015.

It is not an unprimeable number, because it can be changed into a prime (51047473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46158 + ... + 47250.

It is an arithmetic number, because the mean of its divisors is an integer number (1899184).

Almost surely, 2^51047472 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 51047472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75967360).

51047472 is an abundant number, since it is smaller than the sum of its proper divisors (100887248).

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

51047472 is a wasteful number, since it uses less digits than its factorization.

51047472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1250 (or 1244 counting only the distinct ones).

The product of its (nonzero) digits is 7840, while the sum is 30.

The square root of 51047472 is about 7144.7513602644. The cubic root of 51047472 is about 370.9580043668.

The spelling of 51047472 in words is "fifty-one million, forty-seven thousand, four hundred seventy-two".