51267680 has 48 divisors (see below), whose sum is σ = 122853024. Its totient is φ = 20213760.

The previous prime is 51267673. The next prime is 51267779. The reversal of 51267680 is 8676215.

It is a self number, because there is not a number n which added to its sum of digits gives 51267680.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9104 + ... + 13616.

It is an arithmetic number, because the mean of its divisors is an integer number (2559438).

Almost surely, 2^51267680 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 51267680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61426512).

51267680 is an abundant number, since it is smaller than the sum of its proper divisors (71585344).

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

51267680 is a wasteful number, since it uses less digits than its factorization.

51267680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4599 (or 4591 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 51267680 is about 7160.1452499234. The cubic root of 51267680 is about 371.4906506550.

The spelling of 51267680 in words is "fifty-one million, two hundred sixty-seven thousand, six hundred eighty".