1231306223 has 8 divisors (see below), whose sum is σ = 1431058560. Its totient is φ = 1037516760.

The previous prime is 1231306217. The next prime is 1231306231. The reversal of 1231306223 is 3226031321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1231306223 - 2⁶ = 1231306159 is a prime.

It is a super-2 number, since 2×1231306223² = 3032230029597051458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231306213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490273 + ... + 1491098.

It is an arithmetic number, because the mean of its divisors is an integer number (178882320).

Almost surely, 2^1231306223 is an apocalyptic number.

1231306223 is a deficient number, since it is larger than the sum of its proper divisors (199752337).

1231306223 is an equidigital number, since it uses as much as digits as its factorization.

1231306223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2981437.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 1231306223 is about 35089.9732544783. The cubic root of 1231306223 is about 1071.8204149748.

Adding to 1231306223 its reverse (3226031321), we get a palindrome (4457337544).

The spelling of 1231306223 in words is "one billion, two hundred thirty-one million, three hundred six thousand, two hundred twenty-three".