1231310345 has 8 divisors (see below), whose sum is σ = 1497813576. Its totient is φ = 971554176.

The previous prime is 1231310317. The next prime is 1231310393. The reversal of 1231310345 is 5430131321.

It can be written as a sum of positive squares in 4 ways, for example, as 10995856 + 1220314489 = 3316^2 + 34933^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1231310345 - 2⁶ = 1231310281 is a prime.

It is a super-2 number, since 2×1231310345² = 3032250331408038050, which contains 22 as substring.

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 1231310345.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1686362 + ... + 1687091.

It is an arithmetic number, because the mean of its divisors is an integer number (187226697).

Almost surely, 2^1231310345 is an apocalyptic number.

It is an amenable number.

1231310345 is a deficient number, since it is larger than the sum of its proper divisors (266503231).

1231310345 is an equidigital number, since it uses as much as digits as its factorization.

1231310345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3373531.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1231310345 is about 35090.0319891561. The cubic root of 1231310345 is about 1071.8216110052.

Adding to 1231310345 its reverse (5430131321), we get a palindrome (6661441666).

The spelling of 1231310345 in words is "one billion, two hundred thirty-one million, three hundred ten thousand, three hundred forty-five".