51580816 has 20 divisors (see below), whose sum is σ = 114214912. Its totient is φ = 22106016.

The previous prime is 51580813. The next prime is 51580831. The reversal of 51580816 is 61808515.

It is not an unprimeable number, because it can be changed into a prime (51580811) 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 3 ways as a sum of consecutive naturals, for example, 230160 + ... + 230383.

Almost surely, 2^51580816 is an apocalyptic number.

51580816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

51580816 is an abundant number, since it is smaller than the sum of its proper divisors (62634096).

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

51580816 is a wasteful number, since it uses less digits than its factorization.

51580816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 460558 (or 460552 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 51580816 is about 7181.9785574729. The cubic root of 51580816 is about 372.2454540717.

The spelling of 51580816 in words is "fifty-one million, five hundred eighty thousand, eight hundred sixteen".