1205231223 has 16 divisors (see below), whose sum is σ = 1837175040. Its totient is φ = 688466496.

The previous prime is 1205231221. The next prime is 1205231233. The reversal of 1205231223 is 3221325021.

It is not a de Polignac number, because 1205231223 - 2¹ = 1205231221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 1205231223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205231221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66211 + ... + 82427.

It is an arithmetic number, because the mean of its divisors is an integer number (114823440).

Almost surely, 2^1205231223 is an apocalyptic number.

1205231223 is a deficient number, since it is larger than the sum of its proper divisors (631943817).

1205231223 is a wasteful number, since it uses less digits than its factorization.

1205231223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19766.

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

The square root of 1205231223 is about 34716.4402409003. The cubic root of 1205231223 is about 1064.2004985074.

Adding to 1205231223 its reverse (3221325021), we get a palindrome (4426556244).

The spelling of 1205231223 in words is "one billion, two hundred five million, two hundred thirty-one thousand, two hundred twenty-three".