51487272 has 64 divisors (see below), whose sum is σ = 143640000. Its totient is φ = 17088192.

The previous prime is 51487259. The next prime is 51487291. The reversal of 51487272 is 27278415.

51487272 is a `hidden beast` number, since 514 + 8 + 72 + 72 = 666.

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

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, 75043 + ... + 75725.

It is an arithmetic number, because the mean of its divisors is an integer number (2244375).

Almost surely, 2^51487272 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 51487272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71820000).

51487272 is an abundant number, since it is smaller than the sum of its proper divisors (92152728).

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

51487272 is a wasteful number, since it uses less digits than its factorization.

51487272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047 (or 1037 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 51487272 is about 7175.4631906240. The cubic root of 51487272 is about 372.0202902564.

The spelling of 51487272 in words is "fifty-one million, four hundred eighty-seven thousand, two hundred seventy-two".