155055405 has 8 divisors (see below), whose sum is σ = 248088672. Its totient is φ = 82696208.

The previous prime is 155055401. The next prime is 155055421. The reversal of 155055405 is 504550551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 155055405 - 2² = 155055401 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155055401) 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, 5168499 + ... + 5168528.

It is an arithmetic number, because the mean of its divisors is an integer number (31011084).

Almost surely, 2^155055405 is an apocalyptic number.

155055405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155055405 is a deficient number, since it is larger than the sum of its proper divisors (93033267).

155055405 is a wasteful number, since it uses less digits than its factorization.

155055405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10337035.

The product of its (nonzero) digits is 12500, while the sum is 30.

The square root of 155055405 is about 12452.1245175271. The cubic root of 155055405 is about 537.2325317897.

It can be divided in two parts, 15505 and 5405, that added together give a triangular number (20910 = T₂₀₄).

The spelling of 155055405 in words is "one hundred fifty-five million, fifty-five thousand, four hundred five".