155241109 has 2 divisors, whose sum is σ = 155241110. Its totient is φ = 155241108.

The previous prime is 155241103. The next prime is 155241131. The reversal of 155241109 is 901142551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131446225 + 23794884 = 11465^2 + 4878^2 .

It is a cyclic number.

It is not a de Polignac number, because 155241109 - 2²⁷ = 21023381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155241103) 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, 77620554 + 77620555.

It is an arithmetic number, because the mean of its divisors is an integer number (77620555).

Almost surely, 2^155241109 is an apocalyptic number.

It is an amenable number.

155241109 is a deficient number, since it is larger than the sum of its proper divisors (1).

155241109 is an equidigital number, since it uses as much as digits as its factorization.

155241109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 155241109 is about 12459.5790057289. The cubic root of 155241109 is about 537.4469205922.

The spelling of 155241109 in words is "one hundred fifty-five million, two hundred forty-one thousand, one hundred nine".