51916580 has 24 divisors (see below), whose sum is σ = 109195128. Its totient is φ = 20734208.

The previous prime is 51916577. The next prime is 51916597. The reversal of 51916580 is 8561915.

It can be written as a sum of positive squares in 4 ways, for example, as 12503296 + 39413284 = 3536^2 + 6278^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51916580.

It is an unprimeable number.

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, 14312 + ... + 17568.

It is an arithmetic number, because the mean of its divisors is an integer number (4549797).

Almost surely, 2^51916580 is an apocalyptic number.

It is an amenable number.

51916580 is an abundant number, since it is smaller than the sum of its proper divisors (57278548).

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

51916580 is a wasteful number, since it uses less digits than its factorization.

51916580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063 (or 4061 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 35.

The square root of 51916580 is about 7205.3160929969. The cubic root of 51916580 is about 373.0514152136.

The spelling of 51916580 in words is "fifty-one million, nine hundred sixteen thousand, five hundred eighty".