155055030 has 64 divisors (see below), whose sum is σ = 410574528. Its totient is φ = 37232640.

The previous prime is 155055023. The next prime is 155055031. The reversal of 155055030 is 30550551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155055031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11142 + ... + 20838.

It is an arithmetic number, because the mean of its divisors is an integer number (6415227).

Almost surely, 2^155055030 is an apocalyptic number.

155055030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155055030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205287264).

155055030 is an abundant number, since it is smaller than the sum of its proper divisors (255519498).

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

155055030 is a wasteful number, since it uses less digits than its factorization.

155055030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9761.

The product of its (nonzero) digits is 1875, while the sum is 24.

The square root of 155055030 is about 12452.1094598466. The cubic root of 155055030 is about 537.2320986921.

The spelling of 155055030 in words is "one hundred fifty-five million, fifty-five thousand, thirty".