155399130 has 48 divisors (see below), whose sum is σ = 410084064. Its totient is φ = 40819680.

The previous prime is 155399077. The next prime is 155399213. The reversal of 155399130 is 31993551.

155399130 is a `hidden beast` number, since 1 + 5 + 539 + 91 + 30 = 666.

155399130 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6856 + ... + 18915.

It is an arithmetic number, because the mean of its divisors is an integer number (8543418).

Almost surely, 2^155399130 is an apocalyptic number.

155399130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155399130 is an abundant number, since it is smaller than the sum of its proper divisors (254684934).

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

155399130 is a wasteful number, since it uses less digits than its factorization.

155399130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25851 (or 25848 counting only the distinct ones).

The product of its (nonzero) digits is 18225, while the sum is 36.

The square root of 155399130 is about 12465.9187387051. The cubic root of 155399130 is about 537.6292157339.

The spelling of 155399130 in words is "one hundred fifty-five million, three hundred ninety-nine thousand, one hundred thirty".