155323055 has 4 divisors (see below), whose sum is σ = 186387672. Its totient is φ = 124258440.

The previous prime is 155323037. The next prime is 155323087. The reversal of 155323055 is 550323551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550323551 = 239 ⋅2302609.

It is not a de Polignac number, because 155323055 - 2⁶ = 155322991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15532301 + ... + 15532310.

It is an arithmetic number, because the mean of its divisors is an integer number (46596918).

Almost surely, 2^155323055 is an apocalyptic number.

155323055 is a deficient number, since it is larger than the sum of its proper divisors (31064617).

155323055 is an equidigital number, since it uses as much as digits as its factorization.

155323055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31064616.

The product of its (nonzero) digits is 11250, while the sum is 29.

The square root of 155323055 is about 12462.8670457483. The cubic root of 155323055 is about 537.5414700291.

The spelling of 155323055 in words is "one hundred fifty-five million, three hundred twenty-three thousand, fifty-five".