31331231130 has 32 divisors (see below), whose sum is σ = 75925010304. Its totient is φ = 8273877696.

The previous prime is 31331231111. The next prime is 31331231153. The reversal of 31331231130 is 3113213313.

It is a junction number, because it is equal to n+sod(n) for n = 31331231097 and 31331231106.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5066689 + ... + 5072868.

It is an arithmetic number, because the mean of its divisors is an integer number (2372656572).

Almost surely, 2^31331231130 is an apocalyptic number.

31331231130 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31331231130 is an abundant number, since it is smaller than the sum of its proper divisors (44593779174).

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

31331231130 is a wasteful number, since it uses less digits than its factorization.

31331231130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10139670.

The product of its (nonzero) digits is 486, while the sum is 21.

Adding to 31331231130 its reverse (3113213313), we get a palindrome (34444444443).

The spelling of 31331231130 in words is "thirty-one billion, three hundred thirty-one million, two hundred thirty-one thousand, one hundred thirty".