155115189 has 16 divisors (see below), whose sum is σ = 233697600. Its totient is φ = 101656368.

The previous prime is 155115187. The next prime is 155115199. The reversal of 155115189 is 981511551.

155115189 is a `hidden beast` number, since 15 + 511 + 51 + 89 = 666.

It is not a de Polignac number, because 155115189 - 2¹ = 155115187 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155115187) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47094 + ... + 50279.

It is an arithmetic number, because the mean of its divisors is an integer number (14606100).

Almost surely, 2^155115189 is an apocalyptic number.

It is an amenable number.

155115189 is a deficient number, since it is larger than the sum of its proper divisors (78582411).

155115189 is an equidigital number, since it uses as much as digits as its factorization.

155115189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97441 (or 97435 counting only the distinct ones).

The product of its digits is 9000, while the sum is 36.

The square root of 155115189 is about 12454.5248403944. The cubic root of 155115189 is about 537.3015690105.

The spelling of 155115189 in words is "one hundred fifty-five million, one hundred fifteen thousand, one hundred eighty-nine".