155185201 has 2 divisors, whose sum is σ = 155185202. Its totient is φ = 155185200.

The previous prime is 155185193. The next prime is 155185229. The reversal of 155185201 is 102581551.

It is an a-pointer prime, because the next prime (155185229) can be obtained adding 155185201 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127148176 + 28037025 = 11276^2 + 5295^2 .

It is a cyclic number.

It is not a de Polignac number, because 155185201 - 2³ = 155185193 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 155185201.

It is not a weakly prime, because it can be changed into another prime (155185001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77592600 + 77592601.

It is an arithmetic number, because the mean of its divisors is an integer number (77592601).

Almost surely, 2^155185201 is an apocalyptic number.

It is an amenable number.

155185201 is a deficient number, since it is larger than the sum of its proper divisors (1).

155185201 is an equidigital number, since it uses as much as digits as its factorization.

155185201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2000, while the sum is 28.

The square root of 155185201 is about 12457.3352286916. The cubic root of 155185201 is about 537.3823947493.

The spelling of 155185201 in words is "one hundred fifty-five million, one hundred eighty-five thousand, two hundred one".