51775616 has 16 divisors (see below), whose sum is σ = 103146990. Its totient is φ = 25887744.

The previous prime is 51775609. The next prime is 51775631. The reversal of 51775616 is 61657715.

It can be written as a sum of positive squares in only one way, i.e., 25969216 + 25806400 = 5096^2 + 5080^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 51775616.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202121 + ... + 202376.

Almost surely, 2^51775616 is an apocalyptic number.

It is an amenable number.

51775616 is a deficient number, since it is larger than the sum of its proper divisors (51371374).

51775616 is an equidigital number, since it uses as much as digits as its factorization.

51775616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404511 (or 404499 counting only the distinct ones).

The product of its digits is 44100, while the sum is 38.

The square root of 51775616 is about 7195.5274997737. The cubic root of 51775616 is about 372.7134725228.

The spelling of 51775616 in words is "fifty-one million, seven hundred seventy-five thousand, six hundred sixteen".