155311128 has 128 divisors (see below), whose sum is σ = 501696000. Its totient is φ = 43597440.

The previous prime is 155311103. The next prime is 155311129. The reversal of 155311128 is 821113551.

155311128 is a `hidden beast` number, since 1 + 5 + 531 + 1 + 128 = 666.

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 (155311129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88338 + ... + 90078.

It is an arithmetic number, because the mean of its divisors is an integer number (3919500).

Almost surely, 2^155311128 is an apocalyptic number.

155311128 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 155311128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (250848000).

155311128 is an abundant number, since it is smaller than the sum of its proper divisors (346384872).

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

155311128 is a wasteful number, since it uses less digits than its factorization.

155311128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1822 (or 1812 counting only the distinct ones).

The product of its digits is 1200, while the sum is 27.

The square root of 155311128 is about 12462.3885351083. The cubic root of 155311128 is about 537.5277107040.

Adding to 155311128 its reverse (821113551), we get a palindrome (976424679).

The spelling of 155311128 in words is "one hundred fifty-five million, three hundred eleven thousand, one hundred twenty-eight".