51808588225 has 9 divisors (see below), whose sum is σ = 64244060643. Its totient is φ = 41445960120.

The previous prime is 51808588217. The next prime is 51808588253. The reversal of 51808588225 is 52288580815.

The square root of 51808588225 is 227615.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 18651091761 + 33157496464 = 136569^2 + 182092^2 .

It is not a de Polignac number, because 51808588225 - 2³ = 51808588217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1115314 + ... + 1160836.

Almost surely, 2^51808588225 is an apocalyptic number.

51808588225 is the 227615-th square number.

51808588225 is the 113808-th centered octagonal number.

It is an amenable number.

51808588225 is a deficient number, since it is larger than the sum of its proper divisors (12435472418).

51808588225 is an frugal number, since it uses more digits than its factorization.

51808588225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91056 (or 45528 counting only the distinct ones).

The product of its (nonzero) digits is 2048000, while the sum is 52.

The spelling of 51808588225 in words is "fifty-one billion, eight hundred eight million, five hundred eighty-eight thousand, two hundred twenty-five".