155138188 has 24 divisors (see below), whose sum is σ = 281564192. Its totient is φ = 74732544.

The previous prime is 155138161. The next prime is 155138227. The reversal of 155138188 is 881831551.

155138188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 155138188.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10156 + ... + 20332.

Almost surely, 2^155138188 is an apocalyptic number.

It is an amenable number.

155138188 is a deficient number, since it is larger than the sum of its proper divisors (126426004).

155138188 is a wasteful number, since it uses less digits than its factorization.

155138188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10321 (or 10319 counting only the distinct ones).

The product of its digits is 38400, while the sum is 40.

The square root of 155138188 is about 12455.4481252181. The cubic root of 155138188 is about 537.3281230146.

The spelling of 155138188 in words is "one hundred fifty-five million, one hundred thirty-eight thousand, one hundred eighty-eight".