155551455 has 16 divisors (see below), whose sum is σ = 276536160. Its totient is φ = 82960704.

The previous prime is 155551453. The next prime is 155551489. The reversal of 155551455 is 554155551.

155551455 is a `hidden beast` number, since 1 + 55 + 551 + 4 + 55 = 666.

It is not a de Polignac number, because 155551455 - 2¹ = 155551453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155551453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 575982 + ... + 576251.

It is an arithmetic number, because the mean of its divisors is an integer number (17283510).

Almost surely, 2^155551455 is an apocalyptic number.

155551455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

155551455 is a deficient number, since it is larger than the sum of its proper divisors (120984705).

155551455 is a wasteful number, since it uses less digits than its factorization.

155551455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152247 (or 1152241 counting only the distinct ones).

The product of its digits is 62500, while the sum is 36.

The square root of 155551455 is about 12472.0269002276. The cubic root of 155551455 is about 537.8048229520.

The spelling of 155551455 in words is "one hundred fifty-five million, five hundred fifty-one thousand, four hundred fifty-five".