155189500 has 24 divisors (see below), whose sum is σ = 338934960. Its totient is φ = 62075600.

The previous prime is 155189479. The next prime is 155189521. The reversal of 155189500 is 5981551.

155189500 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (155189479) and next prime (155189521).

155189500 is strictly pandigital in base 9.

It is a congruent number.

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, 154690 + ... + 155689.

It is an arithmetic number, because the mean of its divisors is an integer number (14122290).

Almost surely, 2^155189500 is an apocalyptic number.

155189500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155189500 is an abundant number, since it is smaller than the sum of its proper divisors (183745460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

155189500 is a wasteful number, since it uses less digits than its factorization.

155189500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310398 (or 310386 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 155189500 is about 12457.5077764375. The cubic root of 155189500 is about 537.3873569613.

The spelling of 155189500 in words is "one hundred fifty-five million, one hundred eighty-nine thousand, five hundred".