155544020 has 24 divisors (see below), whose sum is σ = 331120104. Its totient is φ = 61364736.

The previous prime is 155544017. The next prime is 155544047. The reversal of 155544020 is 20445551.

It can be written as a sum of positive squares in 4 ways, for example, as 1684804 + 153859216 = 1298^2 + 12404^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51809 + ... + 54728.

It is an arithmetic number, because the mean of its divisors is an integer number (13796671).

Almost surely, 2^155544020 is an apocalyptic number.

155544020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155544020 is an abundant number, since it is smaller than the sum of its proper divisors (175576084).

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

155544020 is a wasteful number, since it uses less digits than its factorization.

155544020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106619 (or 106617 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 155544020 is about 12471.7288296371. The cubic root of 155544020 is about 537.7962542064.

Adding to 155544020 its reverse (20445551), we get a palindrome (175989571).

The spelling of 155544020 in words is "one hundred fifty-five million, five hundred forty-four thousand, twenty".