52478216321 has 2 divisors, whose sum is σ = 52478216322. Its totient is φ = 52478216320.

The previous prime is 52478216311. The next prime is 52478216333. The reversal of 52478216321 is 12361287425.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36898183921 + 15580032400 = 192089^2 + 124820^2 .

It is a cyclic number.

It is not a de Polignac number, because 52478216321 - 2⁶ = 52478216257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (52478216311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26239108160 + 26239108161.

It is an arithmetic number, because the mean of its divisors is an integer number (26239108161).

Almost surely, 2^52478216321 is an apocalyptic number.

It is an amenable number.

52478216321 is a deficient number, since it is larger than the sum of its proper divisors (1).

52478216321 is an equidigital number, since it uses as much as digits as its factorization.

52478216321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 41.

The spelling of 52478216321 in words is "fifty-two billion, four hundred seventy-eight million, two hundred sixteen thousand, three hundred twenty-one".