155230188 has 12 divisors (see below), whose sum is σ = 362203800. Its totient is φ = 51743392.

The previous prime is 155230147. The next prime is 155230189. The reversal of 155230188 is 881032551.

It is a happy number.

155230188 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×155230188² = 48192822533030688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (155230189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6467913 + ... + 6467936.

It is an arithmetic number, because the mean of its divisors is an integer number (30183650).

Almost surely, 2^155230188 is an apocalyptic number.

It is an amenable number.

155230188 is an abundant number, since it is smaller than the sum of its proper divisors (206973612).

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

155230188 is a wasteful number, since it uses less digits than its factorization.

155230188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12935856 (or 12935854 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 33.

The square root of 155230188 is about 12459.1407408376. The cubic root of 155230188 is about 537.4343174111.

The spelling of 155230188 in words is "one hundred fifty-five million, two hundred thirty thousand, one hundred eighty-eight".