51338680 has 32 divisors (see below), whose sum is σ = 117145440. Its totient is φ = 20245120.

The previous prime is 51338669. The next prime is 51338681. The reversal of 51338680 is 8683315.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51338681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6199 + ... + 11878.

It is an arithmetic number, because the mean of its divisors is an integer number (3660795).

Almost surely, 2^51338680 is an apocalyptic number.

It is an amenable number.

51338680 is an abundant number, since it is smaller than the sum of its proper divisors (65806760).

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

51338680 is a wasteful number, since it uses less digits than its factorization.

51338680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18159 (or 18155 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 51338680 is about 7165.1015345213. The cubic root of 51338680 is about 371.6620625445.

It can be divided in two parts, 513 and 38680, that added together give a palindrome (39193).

The spelling of 51338680 in words is "fifty-one million, three hundred thirty-eight thousand, six hundred eighty".