30311031000 has 128 divisors (see below), whose sum is σ = 94881346560. Its totient is φ = 8056368000.

The previous prime is 30311030993. The next prime is 30311031001. The reversal of 30311031000 is 13011303.

It is a super-2 number, since 2×30311031000² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30311031001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 904545 + ... + 937455.

It is an arithmetic number, because the mean of its divisors is an integer number (741260520).

Almost surely, 2^30311031000 is an apocalyptic number.

30311031000 is a gapful number since it is divisible by the number (30) 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 30311031000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47440673280).

30311031000 is an abundant number, since it is smaller than the sum of its proper divisors (64570315560).

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

30311031000 is a wasteful number, since it uses less digits than its factorization.

30311031000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33242 (or 33228 counting only the distinct ones).

The product of its (nonzero) digits is 27, while the sum is 12.

Adding to 30311031000 its reverse (13011303), we get a palindrome (30324042303).

The spelling of 30311031000 in words is "thirty billion, three hundred eleven million, thirty-one thousand".