200155217 has 2 divisors, whose sum is σ = 200155218. Its totient is φ = 200155216.

The previous prime is 200155201. The next prime is 200155231. The reversal of 200155217 is 712551002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148084561 + 52070656 = 12169^2 + 7216^2 .

It is a cyclic number.

It is not a de Polignac number, because 200155217 - 2⁴ = 200155201 is a prime.

It is a super-2 number, since 2×200155217² = 80124221784634178, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 200155192 and 200155201.

It is not a weakly prime, because it can be changed into another prime (200155117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100077608 + 100077609.

It is an arithmetic number, because the mean of its divisors is an integer number (100077609).

Almost surely, 2^200155217 is an apocalyptic number.

It is an amenable number.

200155217 is a deficient number, since it is larger than the sum of its proper divisors (1).

200155217 is an equidigital number, since it uses as much as digits as its factorization.

200155217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 200155217 is about 14147.6223090666. The cubic root of 200155217 is about 584.9547942763.

The spelling of 200155217 in words is "two hundred million, one hundred fifty-five thousand, two hundred seventeen".