5217812585321 has 6 divisors (see below), whose sum is σ = 6069700354410. Its totient is φ = 4472410787376.

The previous prime is 5217812585317. The next prime is 5217812585333. The reversal of 5217812585321 is 1235852187125.

It can be written as a sum of positive squares in only one way, i.e., 5123142526096 + 94670059225 = 2263436^2 + 307685^2 .

It is not a de Polignac number, because 5217812585321 - 2² = 5217812585317 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5217812585321.

It is not an unprimeable number, because it can be changed into a prime (5217812585311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53242985516 + ... + 53242985613.

It is an arithmetic number, because the mean of its divisors is an integer number (1011616725735).

Almost surely, 2^{5217812585321} is an apocalyptic number.

It is an amenable number.

5217812585321 is a deficient number, since it is larger than the sum of its proper divisors (851887769089).

5217812585321 is a wasteful number, since it uses less digits than its factorization.

5217812585321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106485971143 (or 106485971136 counting only the distinct ones).

The product of its digits is 1344000, while the sum is 50.

The spelling of 5217812585321 in words is "five trillion, two hundred seventeen billion, eight hundred twelve million, five hundred eighty-five thousand, three hundred twenty-one".