51340660 has 48 divisors (see below), whose sum is σ = 129709440. Its totient is φ = 16675200.

The previous prime is 51340649. The next prime is 51340661. The reversal of 51340660 is 6604315.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51340661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6991 + ... + 12310.

It is an arithmetic number, because the mean of its divisors is an integer number (2702280).

Almost surely, 2^51340660 is an apocalyptic number.

It is an amenable number.

51340660 is an abundant number, since it is smaller than the sum of its proper divisors (78368780).

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

51340660 is a wasteful number, since it uses less digits than its factorization.

51340660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19336 (or 19334 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 51340660 is about 7165.2397028990. The cubic root of 51340660 is about 371.6668404976. Note that the first 3 decimals are identical.

Adding to 51340660 its reverse (6604315), we get a palindrome (57944975).

The spelling of 51340660 in words is "fifty-one million, three hundred forty thousand, six hundred sixty".