31431330020130 has 128 divisors (see below), whose sum is σ = 80637197760000. Its totient is φ = 7813227577344.

The previous prime is 31431330020081. The next prime is 31431330020159. The reversal of 31431330020130 is 3102003313413.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31431330020130.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 80429446 + ... + 80819294.

It is an arithmetic number, because the mean of its divisors is an integer number (629978107500).

Almost surely, 2^{31431330020130} is an apocalyptic number.

31431330020130 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 31431330020130, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40318598880000).

31431330020130 is an abundant number, since it is smaller than the sum of its proper divisors (49205867739870).

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

31431330020130 is a wasteful number, since it uses less digits than its factorization.

31431330020130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 391388.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 31431330020130 its reverse (3102003313413), we get a palindrome (34533333333543).

The spelling of 31431330020130 in words is "thirty-one trillion, four hundred thirty-one billion, three hundred thirty million, twenty thousand, one hundred thirty".