51260730 has 64 divisors (see below), whose sum is σ = 127733760. Its totient is φ = 13156416.

The previous prime is 51260723. The next prime is 51260743. The reversal of 51260730 is 3706215.

51260730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 51260730.

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 31 ways as a sum of consecutive naturals, for example, 101659 + ... + 102161.

It is an arithmetic number, because the mean of its divisors is an integer number (1995840).

Almost surely, 2^51260730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51260730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63866880).

51260730 is an abundant number, since it is smaller than the sum of its proper divisors (76473030).

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

51260730 is a wasteful number, since it uses less digits than its factorization.

51260730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635.

The product of its (nonzero) digits is 1260, while the sum is 24.

The square root of 51260730 is about 7159.6599081241. The cubic root of 51260730 is about 371.4738631019.

Adding to 51260730 its reverse (3706215), we get a palindrome (54966945).

The spelling of 51260730 in words is "fifty-one million, two hundred sixty thousand, seven hundred thirty".