155131200 has 588 divisors, whose sum is σ = 688502560. Its totient is φ = 33592320.

The previous prime is 155131199. The next prime is 155131213. The reversal of 155131200 is 2131551.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 8164791 + ... + 8164809.

Almost surely, 2^155131200 is an apocalyptic number.

155131200 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 155131200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (344251280).

155131200 is an abundant number, since it is smaller than the sum of its proper divisors (533371360).

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

155131200 is an equidigital number, since it uses as much as digits as its factorization.

155131200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 155131200 is about 12455.1676022445. The cubic root of 155131200 is about 537.3200551423.

Adding to 155131200 its reverse (2131551), we get a palindrome (157262751).

The spelling of 155131200 in words is "one hundred fifty-five million, one hundred thirty-one thousand, two hundred".