155108881 has 2 divisors, whose sum is σ = 155108882. Its totient is φ = 155108880.

The previous prime is 155108879. The next prime is 155108887. The reversal of 155108881 is 188801551.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 140209281 + 14899600 = 11841^2 + 3860^2 .

It is an emirp because it is prime and its reverse (188801551) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 155108881 - 2¹ = 155108879 is a prime.

It is a super-2 number, since 2×155108881² = 48117529930144322, which contains 22 as substring.

Together with 155108879, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 155108881.

It is not a weakly prime, because it can be changed into another prime (155108887) 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, 77554440 + 77554441.

It is an arithmetic number, because the mean of its divisors is an integer number (77554441).

Almost surely, 2^155108881 is an apocalyptic number.

It is an amenable number.

155108881 is a deficient number, since it is larger than the sum of its proper divisors (1).

155108881 is an equidigital number, since it uses as much as digits as its factorization.

155108881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12800, while the sum is 37.

The square root of 155108881 is about 12454.2715965246. The cubic root of 155108881 is about 537.2942855110.

The spelling of 155108881 in words is "one hundred fifty-five million, one hundred eight thousand, eight hundred eighty-one".