1231312030 has 48 divisors (see below), whose sum is σ = 2405595024. Its totient is φ = 453573120.

The previous prime is 1231312021. The next prime is 1231312037. The reversal of 1231312030 is 302131321.

It is a super-2 number, since 2×1231312030² = 3032258630445441800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231311995 and 1231312013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231312037) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1397190 + ... + 1398070.

It is an arithmetic number, because the mean of its divisors is an integer number (50116563).

Almost surely, 2^1231312030 is an apocalyptic number.

1231312030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1231312030 is a deficient number, since it is larger than the sum of its proper divisors (1174282994).

1231312030 is a wasteful number, since it uses less digits than its factorization.

1231312030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741 (or 1728 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 1231312030 is about 35090.0559988154. The cubic root of 1231312030 is about 1071.8220999202.

Adding to 1231312030 its reverse (302131321), we get a palindrome (1533443351).

The spelling of 1231312030 in words is "one billion, two hundred thirty-one million, three hundred twelve thousand, thirty".