2100355217 has 2 divisors, whose sum is σ = 2100355218. Its totient is φ = 2100355216.

The previous prime is 2100355211. The next prime is 2100355241. The reversal of 2100355217 is 7125530012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1096669456 + 1003685761 = 33116^2 + 31681^2 .

It is a cyclic number.

It is not a de Polignac number, because 2100355217 - 2⁸ = 2100354961 is a prime.

It is a super-2 number, since 2×2100355217² = 8822984075158234178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2100355211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050177608 + 1050177609.

It is an arithmetic number, because the mean of its divisors is an integer number (1050177609).

Almost surely, 2^2100355217 is an apocalyptic number.

It is an amenable number.

2100355217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2100355217 is an equidigital number, since it uses as much as digits as its factorization.

2100355217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2100355217 is about 45829.6325208920. The cubic root of 2100355217 is about 1280.6513646452.

Adding to 2100355217 its reverse (7125530012), we get a palindrome (9225885229).

The spelling of 2100355217 in words is "two billion, one hundred million, three hundred fifty-five thousand, two hundred seventeen".