155111200 has 72 divisors (see below), whose sum is σ = 387982980. Its totient is φ = 60518400.

The previous prime is 155111189. The next prime is 155111267. The reversal of 155111200 is 2111551.

155111200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 258064 + 154853136 = 508^2 + 12444^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30436 + ... + 35164.

Almost surely, 2^155111200 is an apocalyptic number.

155111200 is a gapful number since it is divisible by the number (10) 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 155111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193991490).

155111200 is an abundant number, since it is smaller than the sum of its proper divisors (232871780).

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

155111200 is a wasteful number, since it uses less digits than its factorization.

155111200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790 (or 4777 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 155111200 is about 12454.3646967639. The cubic root of 155111200 is about 537.2969631553.

Adding to 155111200 its reverse (2111551), we get a palindrome (157222751).

The spelling of 155111200 in words is "one hundred fifty-five million, one hundred eleven thousand, two hundred".