155520204 has 96 divisors (see below), whose sum is σ = 437584896. Its totient is φ = 42028800.

The previous prime is 155520203. The next prime is 155520221. The reversal of 155520204 is 402025551.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (155520203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 194734 + ... + 195530.

It is an arithmetic number, because the mean of its divisors is an integer number (4558176).

Almost surely, 2^155520204 is an apocalyptic number.

155520204 is a gapful number since it is divisible by the number (14) 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 155520204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (218792448).

155520204 is an abundant number, since it is smaller than the sum of its proper divisors (282064692).

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

155520204 is a wasteful number, since it uses less digits than its factorization.

155520204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 935 (or 933 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 155520204 is about 12470.7739936220. The cubic root of 155520204 is about 537.7688047222.

Adding to 155520204 its reverse (402025551), we get a palindrome (557545755).

The spelling of 155520204 in words is "one hundred fifty-five million, five hundred twenty thousand, two hundred four".