2031506340 has 96 divisors (see below), whose sum is σ = 5775307776. Its totient is φ = 533485440.

The previous prime is 2031506339. The next prime is 2031506381. The reversal of 2031506340 is 436051302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2031506340.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2504535 + ... + 2505345.

It is an arithmetic number, because the mean of its divisors is an integer number (60159456).

Almost surely, 2^2031506340 is an apocalyptic number.

2031506340 is a gapful number since it is divisible by the number (20) 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 2031506340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2887653888).

2031506340 is an abundant number, since it is smaller than the sum of its proper divisors (3743801436).

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

2031506340 is a wasteful number, since it uses less digits than its factorization.

2031506340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409 (or 1407 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 2031506340 is about 45072.2346905498. The cubic root of 2031506340 is about 1266.5025270536.

Adding to 2031506340 its reverse (436051302), we get a palindrome (2467557642).

The spelling of 2031506340 in words is "two billion, thirty-one million, five hundred six thousand, three hundred forty".