155204055 has 24 divisors (see below), whose sum is σ = 269644752. Its totient is φ = 82583424.

The previous prime is 155204051. The next prime is 155204057. The reversal of 155204055 is 550402551.

It is not a de Polignac number, because 155204055 - 2² = 155204051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155204051) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 16792 + ... + 24338.

It is an arithmetic number, because the mean of its divisors is an integer number (11235198).

Almost surely, 2^155204055 is an apocalyptic number.

155204055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155204055 is a deficient number, since it is larger than the sum of its proper divisors (114440697).

155204055 is a wasteful number, since it uses less digits than its factorization.

155204055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8015 (or 8012 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 155204055 is about 12458.0919486091. The cubic root of 155204055 is about 537.4041566985.

The spelling of 155204055 in words is "one hundred fifty-five million, two hundred four thousand, fifty-five".