99855211 has 2 divisors, whose sum is σ = 99855212. Its totient is φ = 99855210.

The previous prime is 99855191. The next prime is 99855251. The reversal of 99855211 is 11255899.

It is an a-pointer prime, because the next prime (99855251) can be obtained adding 99855211 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 99855211 - 2⁷ = 99855083 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (99855251) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49927605 + 49927606.

It is an arithmetic number, because the mean of its divisors is an integer number (49927606).

Almost surely, 2^99855211 is an apocalyptic number.

99855211 is a deficient number, since it is larger than the sum of its proper divisors (1).

99855211 is an equidigital number, since it uses as much as digits as its factorization.

99855211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32400, while the sum is 40.

The square root of 99855211 is about 9992.7579276194. The cubic root of 99855211 is about 463.9347581550.

The spelling of 99855211 in words is "ninety-nine million, eight hundred fifty-five thousand, two hundred eleven".