235121223 has 4 divisors (see below), whose sum is σ = 313494968. Its totient is φ = 156747480.

The previous prime is 235121221. The next prime is 235121231. The reversal of 235121223 is 322121532.

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

It is not a de Polignac number, because 235121223 - 2¹ = 235121221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 235121223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (235121221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39186868 + ... + 39186873.

It is an arithmetic number, because the mean of its divisors is an integer number (78373742).

Almost surely, 2^235121223 is an apocalyptic number.

235121223 is a deficient number, since it is larger than the sum of its proper divisors (78373745).

235121223 is an equidigital number, since it uses as much as digits as its factorization.

235121223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78373744.

The product of its digits is 720, while the sum is 21.

The square root of 235121223 is about 15333.6630652953. The cubic root of 235121223 is about 617.2066699505.

Adding to 235121223 its reverse (322121532), we get a palindrome (557242755).

The spelling of 235121223 in words is "two hundred thirty-five million, one hundred twenty-one thousand, two hundred twenty-three".