155115200 has 84 divisors (see below), whose sum is σ = 394959840. Its totient is φ = 59888640.

The previous prime is 155115199. The next prime is 155115209. The reversal of 155115200 is 2511551.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (155115209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44729 + ... + 48071.

Almost surely, 2^155115200 is an apocalyptic number.

155115200 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 155115200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (197479920).

155115200 is an abundant number, since it is smaller than the sum of its proper divisors (239844640).

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

155115200 is a wasteful number, since it uses less digits than its factorization.

155115200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3394 (or 3379 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 155115200 is about 12454.5252820009. The cubic root of 155115200 is about 537.3015817115.

Adding to 155115200 its reverse (2511551), we get a palindrome (157626751).

The spelling of 155115200 in words is "one hundred fifty-five million, one hundred fifteen thousand, two hundred".