155420055 has 24 divisors (see below), whose sum is σ = 307880352. Its totient is φ = 71049024.

The previous prime is 155420029. The next prime is 155420059. The reversal of 155420055 is 550024551.

It is not a de Polignac number, because 155420055 - 2¹⁴ = 155403671 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155420059) 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, 246384 + ... + 247013.

It is an arithmetic number, because the mean of its divisors is an integer number (12828348).

Almost surely, 2^155420055 is an apocalyptic number.

155420055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155420055 is a deficient number, since it is larger than the sum of its proper divisors (152460297).

155420055 is a wasteful number, since it uses less digits than its factorization.

155420055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493415 (or 493412 counting only the distinct ones).

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

The square root of 155420055 is about 12466.7579987742. The cubic root of 155420055 is about 537.6533458271.

It can be divided in two parts, 1554 and 20055, that added together give a square (21609 = 147²).

The spelling of 155420055 in words is "one hundred fifty-five million, four hundred twenty thousand, fifty-five".