155403204 has 144 divisors (see below), whose sum is σ = 432579840. Its totient is φ = 43243200.

The previous prime is 155403181. The next prime is 155403221. The reversal of 155403204 is 402304551.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 1186219 + ... + 1186349.

Almost surely, 2^155403204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155403204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216289920).

155403204 is an abundant number, since it is smaller than the sum of its proper divisors (277176636).

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

155403204 is a wasteful number, since it uses less digits than its factorization.

155403204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222 (or 209 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 155403204 is about 12466.0821431595. The cubic root of 155403204 is about 537.6339139204.

Adding to 155403204 its reverse (402304551), we get a palindrome (557707755).

The spelling of 155403204 in words is "one hundred fifty-five million, four hundred three thousand, two hundred four".