31301031000 has 128 divisors (see below), whose sum is σ = 98572930560. Its totient is φ = 8268848000.

The previous prime is 31301030911. The next prime is 31301031011. The reversal of 31301031000 is 13010313.

It is a super-2 number, since 2×31301031000² (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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 272245 + ... + 369755.

It is an arithmetic number, because the mean of its divisors is an integer number (770101020).

Almost surely, 2^31301031000 is an apocalyptic number.

31301031000 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 31301031000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49286465280).

31301031000 is an abundant number, since it is smaller than the sum of its proper divisors (67271899560).

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

31301031000 is a wasteful number, since it uses less digits than its factorization.

31301031000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97642 (or 97628 counting only the distinct ones).

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

Adding to 31301031000 its reverse (13010313), we get a palindrome (31314041313).

The spelling of 31301031000 in words is "thirty-one billion, three hundred one million, thirty-one thousand".