51227816484321 has 9 divisors (see below), whose sum is σ = 73995765937041. Its totient is φ = 34151863341492.

The previous prime is 51227816484283. The next prime is 51227816484323. The reversal of 51227816484321 is 12348461872215.

The square root of 51227816484321 is 7157361.

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

51227816484321 is a `hidden beast` number, since 5 + 1 + 2 + 278 + 1 + 6 + 48 + 4 + 321 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 51227816484321 - 2¹³ = 51227816476129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51227816484323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20279190 + ... + 22664976.

Almost surely, 2^{51227816484321} is an apocalyptic number.

51227816484321 is the 7157361-st square number.

51227816484321 is the 3578681-st centered octagonal number.

It is an amenable number.

51227816484321 is a deficient number, since it is larger than the sum of its proper divisors (22767949452720).

51227816484321 is an frugal number, since it uses more digits than its factorization.

51227816484321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4771580 (or 2385790 counting only the distinct ones).

The product of its digits is 5160960, while the sum is 54.

The spelling of 51227816484321 in words is "fifty-one trillion, two hundred twenty-seven billion, eight hundred sixteen million, four hundred eighty-four thousand, three hundred twenty-one".