155805552 has 160 divisors (see below), whose sum is σ = 519411200. Its totient is φ = 43794432.

The previous prime is 155805541. The next prime is 155805577. The reversal of 155805552 is 255508551.

155805552 is a `hidden beast` number, since 1 + 558 + 0 + 55 + 52 = 666.

It is a super-3 number, since 3×155805552³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 31 ways as a sum of consecutive naturals, for example, 202224 + ... + 202992.

It is an arithmetic number, because the mean of its divisors is an integer number (3246320).

Almost surely, 2^155805552 is an apocalyptic number.

155805552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155805552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259705600).

155805552 is an abundant number, since it is smaller than the sum of its proper divisors (363605648).

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

155805552 is a wasteful number, since it uses less digits than its factorization.

155805552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 848 counting only the distinct ones).

The product of its (nonzero) digits is 50000, while the sum is 36.

The square root of 155805552 is about 12482.2094198103. The cubic root of 155805552 is about 538.0975026317.

The spelling of 155805552 in words is "one hundred fifty-five million, eight hundred five thousand, five hundred fifty-two".