51307560 has 64 divisors (see below), whose sum is σ = 171028800. Its totient is φ = 13681728.

The previous prime is 51307519. The next prime is 51307561. The reversal of 51307560 is 6570315.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51307561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22674 + ... + 24833.

It is an arithmetic number, because the mean of its divisors is an integer number (2672325).

Almost surely, 2^51307560 is an apocalyptic number.

It is an amenable number.

51307560 is an abundant number, since it is smaller than the sum of its proper divisors (119721240).

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

51307560 is a wasteful number, since it uses less digits than its factorization.

51307560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47527 (or 47517 counting only the distinct ones).

The product of its (nonzero) digits is 3150, while the sum is 27.

The square root of 51307560 is about 7162.9295682702. The cubic root of 51307560 is about 371.5869504900.

Adding to 51307560 its reverse (6570315), we get a palindrome (57877875).

The spelling of 51307560 in words is "fifty-one million, three hundred seven thousand, five hundred sixty".