31027101930 has 288 divisors, whose sum is σ = 91495692288. Its totient is φ = 7285259520.

The previous prime is 31027101893. The next prime is 31027101983. The reversal of 31027101930 is 3910172013.

It is a junction number, because it is equal to n+sod(n) for n = 31027101894 and 31027101903.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 81010519 + ... + 81010901.

It is an arithmetic number, because the mean of its divisors is an integer number (317693376).

Almost surely, 2^31027101930 is an apocalyptic number.

31027101930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31027101930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45747846144).

31027101930 is an abundant number, since it is smaller than the sum of its proper divisors (60468590358).

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

31027101930 is a wasteful number, since it uses less digits than its factorization.

31027101930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

Adding to 31027101930 its reverse (3910172013), we get a palindrome (34937273943).

The spelling of 31027101930 in words is "thirty-one billion, twenty-seven million, one hundred one thousand, nine hundred thirty".