255655121 has 4 divisors (see below), whose sum is σ = 255890544. Its totient is φ = 255419700.

The previous prime is 255655117. The next prime is 255655151. The reversal of 255655121 is 121556552.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 255655121 - 2² = 255655117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (255655151) 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, 116075 + ... + 118256.

It is an arithmetic number, because the mean of its divisors is an integer number (63972636).

Almost surely, 2^255655121 is an apocalyptic number.

It is an amenable number.

255655121 is a deficient number, since it is larger than the sum of its proper divisors (235423).

255655121 is a wasteful number, since it uses less digits than its factorization.

255655121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235422.

The product of its digits is 15000, while the sum is 32.

The square root of 255655121 is about 15989.2188989957. The cubic root of 255655121 is about 634.6751565606.

The spelling of 255655121 in words is "two hundred fifty-five million, six hundred fifty-five thousand, one hundred twenty-one".