155200000 has 120 divisors (see below), whose sum is σ = 391592124. Its totient is φ = 61440000.

The previous prime is 155199997. The next prime is 155200007. The reversal of 155200000 is 2551.

It can be written as a sum of positive squares in 6 ways, for example, as 21381376 + 133818624 = 4624^2 + 11568^2 .

It is not an unprimeable number, because it can be changed into a prime (155200007) 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, 1599952 + ... + 1600048.

Almost surely, 2^155200000 is an apocalyptic number.

155200000 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 155200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195796062).

155200000 is an abundant number, since it is smaller than the sum of its proper divisors (236392124).

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

155200000 is an frugal number, since it uses more digits than its factorization.

155200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 104 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 155200000 is about 12457.9292019179. The cubic root of 155200000 is about 537.3994764238.

Adding to 155200000 its reverse (2551), we get a palindrome (155202551).

The spelling of 155200000 in words is "one hundred fifty-five million, two hundred thousand".