155683855 has 4 divisors (see below), whose sum is σ = 186820632. Its totient is φ = 124547080.

The previous prime is 155683837. The next prime is 155683867. The reversal of 155683855 is 558386551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 558386551 = 1949 ⋅286499.

It is not a de Polignac number, because 155683855 - 2¹⁷ = 155552783 is a prime.

It is a super-2 number, since 2×155683855² = 48474925415322050, which contains 22 as substring.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 15568381 + ... + 15568390.

It is an arithmetic number, because the mean of its divisors is an integer number (46705158).

Almost surely, 2^155683855 is an apocalyptic number.

155683855 is a deficient number, since it is larger than the sum of its proper divisors (31136777).

155683855 is an equidigital number, since it uses as much as digits as its factorization.

155683855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31136776.

The product of its digits is 720000, while the sum is 46.

The square root of 155683855 is about 12477.3336494621. Note that the first 3 decimals coincide. The cubic root of 155683855 is about 537.9573666138.

The spelling of 155683855 in words is "one hundred fifty-five million, six hundred eighty-three thousand, eight hundred fifty-five".