98155217 has 2 divisors, whose sum is σ = 98155218. Its totient is φ = 98155216.

The previous prime is 98155199. The next prime is 98155231. The reversal of 98155217 is 71255189.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75411856 + 22743361 = 8684^2 + 4769^2 .

It is an emirp because it is prime and its reverse (71255189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 98155217 - 2⁶ = 98155153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (98155247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49077608 + 49077609.

It is an arithmetic number, because the mean of its divisors is an integer number (49077609).

Almost surely, 2^98155217 is an apocalyptic number.

It is an amenable number.

98155217 is a deficient number, since it is larger than the sum of its proper divisors (1).

98155217 is an equidigital number, since it uses as much as digits as its factorization.

98155217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 38.

The square root of 98155217 is about 9907.3314772445. The cubic root of 98155217 is about 461.2869083256.

The spelling of 98155217 in words is "ninety-eight million, one hundred fifty-five thousand, two hundred seventeen".