155201099 has 2 divisors, whose sum is σ = 155201100. Its totient is φ = 155201098.

The previous prime is 155201089. The next prime is 155201173. The reversal of 155201099 is 990102551.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 155201099 - 2⁴ = 155201083 is a prime.

It is a super-2 number, since 2×155201099² = 48174762261615602, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (155201029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77600549 + 77600550.

It is an arithmetic number, because the mean of its divisors is an integer number (77600550).

Almost surely, 2^155201099 is an apocalyptic number.

155201099 is a deficient number, since it is larger than the sum of its proper divisors (1).

155201099 is an equidigital number, since it uses as much as digits as its factorization.

155201099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 32.

The square root of 155201099 is about 12457.9733102941. The cubic root of 155201099 is about 537.4007448960.

The spelling of 155201099 in words is "one hundred fifty-five million, two hundred one thousand, ninety-nine".