155855459 has 4 divisors (see below), whose sum is σ = 155900304. Its totient is φ = 155810616.

The previous prime is 155855449. The next prime is 155855471. The reversal of 155855459 is 954558551.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 155855459 - 2²⁴ = 139078243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155855419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16727 + ... + 24320.

It is an arithmetic number, because the mean of its divisors is an integer number (38975076).

Almost surely, 2^155855459 is an apocalyptic number.

155855459 is a deficient number, since it is larger than the sum of its proper divisors (44845).

155855459 is an equidigital number, since it uses as much as digits as its factorization.

155855459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44844.

The product of its digits is 900000, while the sum is 47.

The square root of 155855459 is about 12484.2083849958. The cubic root of 155855459 is about 538.1549502320.

The spelling of 155855459 in words is "one hundred fifty-five million, eight hundred fifty-five thousand, four hundred fifty-nine".