255020155 has 24 divisors (see below), whose sum is σ = 335197440. Its totient is φ = 186151680.

The previous prime is 255020149. The next prime is 255020173. The reversal of 255020155 is 551020552.

It is a happy number.

It is not a de Polignac number, because 255020155 - 2⁷ = 255020027 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73510 + ... + 76900.

It is an arithmetic number, because the mean of its divisors is an integer number (13966560).

Almost surely, 2^255020155 is an apocalyptic number.

255020155 is a deficient number, since it is larger than the sum of its proper divisors (80177285).

255020155 is a wasteful number, since it uses less digits than its factorization.

255020155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3511 (or 3498 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 255020155 is about 15969.3504877312. The cubic root of 255020155 is about 634.1492772120.

The spelling of 255020155 in words is "two hundred fifty-five million, twenty thousand, one hundred fifty-five".