155104220 has 24 divisors (see below), whose sum is σ = 342862800. Its totient is φ = 58776192.

The previous prime is 155104193. The next prime is 155104223. The reversal of 155104220 is 22401551.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 155104192 and 155104201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155104223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 203705 + ... + 204464.

It is an arithmetic number, because the mean of its divisors is an integer number (14285950).

Almost surely, 2^155104220 is an apocalyptic number.

155104220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155104220 is an abundant number, since it is smaller than the sum of its proper divisors (187758580).

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

155104220 is a wasteful number, since it uses less digits than its factorization.

155104220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408197 (or 408195 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 155104220 is about 12454.0844705663. The cubic root of 155104220 is about 537.2889035845.

Adding to 155104220 its reverse (22401551), we get a palindrome (177505771).

The spelling of 155104220 in words is "one hundred fifty-five million, one hundred four thousand, two hundred twenty".