1231000223 has 4 divisors (see below), whose sum is σ = 1231070448. Its totient is φ = 1230930000.

The previous prime is 1231000193. The next prime is 1231000229. The reversal of 1231000223 is 3220001321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1231000223 - 2¹⁰ = 1230999199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231000198 and 1231000207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231000229) 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, 15515 + ... + 51987.

It is an arithmetic number, because the mean of its divisors is an integer number (307767612).

Almost surely, 2^1231000223 is an apocalyptic number.

1231000223 is a deficient number, since it is larger than the sum of its proper divisors (70225).

1231000223 is an equidigital number, since it uses as much as digits as its factorization.

1231000223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70224.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1231000223 is about 35085.6127636386. The cubic root of 1231000223 is about 1071.7316192407.

Adding to 1231000223 its reverse (3220001321), we get a palindrome (4451001544).

The spelling of 1231000223 in words is "one billion, two hundred thirty-one million, two hundred twenty-three", and thus it is an aban number.