155531200 has 84 divisors (see below), whose sum is σ = 417542472. Its totient is φ = 56550400.

The previous prime is 155531161. The next prime is 155531209. The reversal of 155531200 is 2135551.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155531209) 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, 13182 + ... + 22018.

Almost surely, 2^155531200 is an apocalyptic number.

155531200 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 155531200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208771236).

155531200 is an abundant number, since it is smaller than the sum of its proper divisors (262011272).

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

155531200 is a wasteful number, since it uses less digits than its factorization.

155531200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8870 (or 8855 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 155531200 is about 12471.2148566208. The cubic root of 155531200 is about 537.7814786734.

Adding to 155531200 its reverse (2135551), we get a palindrome (157666751).

The spelling of 155531200 in words is "one hundred fifty-five million, five hundred thirty-one thousand, two hundred".