2031131380 has 24 divisors (see below), whose sum is σ = 4450828032. Its totient is φ = 777128352.

The previous prime is 2031131363. The next prime is 2031131381. The reversal of 2031131380 is 831311302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031131381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2207292 + ... + 2208211.

It is an arithmetic number, because the mean of its divisors is an integer number (185451168).

Almost surely, 2^2031131380 is an apocalyptic number.

2031131380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031131380 is an abundant number, since it is smaller than the sum of its proper divisors (2419696652).

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

2031131380 is a wasteful number, since it uses less digits than its factorization.

2031131380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4415535 (or 4415533 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 2031131380 is about 45068.0749533414. The cubic root of 2031131380 is about 1266.4246017890.

Adding to 2031131380 its reverse (831311302), we get a palindrome (2862442682).

The spelling of 2031131380 in words is "two billion, thirty-one million, one hundred thirty-one thousand, three hundred eighty".