123255311 has 4 divisors (see below), whose sum is σ = 123694224. Its totient is φ = 122816400.

The previous prime is 123255289. The next prime is 123255313. The reversal of 123255311 is 113552321.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123255311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123255313) 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, 219035 + ... + 219596.

It is an arithmetic number, because the mean of its divisors is an integer number (30923556).

Almost surely, 2^123255311 is an apocalyptic number.

123255311 is a deficient number, since it is larger than the sum of its proper divisors (438913).

123255311 is an equidigital number, since it uses as much as digits as its factorization.

123255311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438912.

The product of its digits is 900, while the sum is 23.

The square root of 123255311 is about 11102.0408484206. The cubic root of 123255311 is about 497.6628403917.

The spelling of 123255311 in words is "one hundred twenty-three million, two hundred fifty-five thousand, three hundred eleven".