51530860 has 24 divisors (see below), whose sum is σ = 108531360. Its totient is φ = 20552064.

The previous prime is 51530849. The next prime is 51530867. The reversal of 51530860 is 6803515.

It is not an unprimeable number, because it can be changed into a prime (51530867) 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 7 ways as a sum of consecutive naturals, for example, 3592 + ... + 10768.

It is an arithmetic number, because the mean of its divisors is an integer number (4522140).

Almost surely, 2^51530860 is an apocalyptic number.

It is an amenable number.

51530860 is an abundant number, since it is smaller than the sum of its proper divisors (57000500).

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

51530860 is a wasteful number, since it uses less digits than its factorization.

51530860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7545 (or 7543 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 51530860 is about 7178.4998432820. The cubic root of 51530860 is about 372.1252420630.

It can be divided in two parts, 515 and 30860, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 51530860 in words is "fifty-one million, five hundred thirty thousand, eight hundred sixty".