155130228 has 108 divisors (see below), whose sum is σ = 447326880. Its totient is φ = 46973520.

The previous prime is 155130163. The next prime is 155130229. The reversal of 155130228 is 822031551.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (108).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155130229) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 116953 + ... + 118271.

Almost surely, 2^155130228 is an apocalyptic number.

155130228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155130228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223663440).

155130228 is an abundant number, since it is smaller than the sum of its proper divisors (292196652).

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

155130228 is a wasteful number, since it uses less digits than its factorization.

155130228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1360 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 155130228 is about 12455.1285822347. The cubic root of 155130228 is about 537.3189329176.

Adding to 155130228 its reverse (822031551), we get a palindrome (977161779).

The spelling of 155130228 in words is "one hundred fifty-five million, one hundred thirty thousand, two hundred twenty-eight".