1231310000 has 100 divisors (see below), whose sum is σ = 3156920712. Its totient is φ = 463488000.

The previous prime is 1231309997. The next prime is 1231310011. The reversal of 1231310000 is 131321.

It is a tau number, because it is divible by the number of its divisors (100).

It is a super-2 number, since 2×1231310000² = 3032248632200000000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 166379 + ... + 173621.

Almost surely, 2^1231310000 is an apocalyptic number.

1231310000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231310000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1578460356).

1231310000 is an abundant number, since it is smaller than the sum of its proper divisors (1925610712).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231310000 is an equidigital number, since it uses as much as digits as its factorization.

1231310000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7288 (or 7267 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1231310000 is about 35090.0270732298. The cubic root of 1231310000 is about 1071.8215109008.

Adding to 1231310000 its reverse (131321), we get a palindrome (1231441321).

The spelling of 1231310000 in words is "one billion, two hundred thirty-one million, three hundred ten thousand".