200155261 has 2 divisors, whose sum is σ = 200155262. Its totient is φ = 200155260.

The previous prime is 200155231. The next prime is 200155289. The reversal of 200155261 is 162551002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 191268900 + 8886361 = 13830^2 + 2981^2 .

It is a cyclic number.

It is not a de Polignac number, because 200155261 - 2¹⁵ = 200122493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200155201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100077630 + 100077631.

It is an arithmetic number, because the mean of its divisors is an integer number (100077631).

Almost surely, 2^200155261 is an apocalyptic number.

It is an amenable number.

200155261 is a deficient number, since it is larger than the sum of its proper divisors (1).

200155261 is an equidigital number, since it uses as much as digits as its factorization.

200155261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 200155261 is about 14147.6238640982. The cubic root of 200155261 is about 584.9548371397.

The spelling of 200155261 in words is "two hundred million, one hundred fifty-five thousand, two hundred sixty-one".