52155520217 has 2 divisors, whose sum is σ = 52155520218. Its totient is φ = 52155520216.

The previous prime is 52155520129. The next prime is 52155520231. The reversal of 52155520217 is 71202555125.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50920630336 + 1234889881 = 225656^2 + 35141^2 .

It is a cyclic number.

It is not a de Polignac number, because 52155520217 - 2³⁴ = 34975651033 is a prime.

It is not a weakly prime, because it can be changed into another prime (52155520297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26077760108 + 26077760109.

It is an arithmetic number, because the mean of its divisors is an integer number (26077760109).

Almost surely, 2^52155520217 is an apocalyptic number.

It is an amenable number.

52155520217 is a deficient number, since it is larger than the sum of its proper divisors (1).

52155520217 is an equidigital number, since it uses as much as digits as its factorization.

52155520217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35000, while the sum is 35.

The spelling of 52155520217 in words is "fifty-two billion, one hundred fifty-five million, five hundred twenty thousand, two hundred seventeen".