51867072 has 84 divisors (see below), whose sum is σ = 151561800. Its totient is φ = 16952832.

The previous prime is 51867059. The next prime is 51867083. The reversal of 51867072 is 27076815.

51867072 is a `hidden beast` number, since 518 + 6 + 70 + 72 = 666.

51867072 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).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 29679 + ... + 31377.

Almost surely, 2^51867072 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 51867072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75780900).

51867072 is an abundant number, since it is smaller than the sum of its proper divisors (99694728).

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

51867072 is a wasteful number, since it uses less digits than its factorization.

51867072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770 (or 1757 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 51867072 is about 7201.8797546196. The cubic root of 51867072 is about 372.9327960537.

The spelling of 51867072 in words is "fifty-one million, eight hundred sixty-seven thousand, seventy-two".