2031211540 has 12 divisors (see below), whose sum is σ = 4265544276. Its totient is φ = 812484608.

The previous prime is 2031211537. The next prime is 2031211541. The reversal of 2031211540 is 451121302.

It can be written as a sum of positive squares in 2 ways, for example, as 1114090884 + 917120656 = 33378^2 + 30284^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031211541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50780269 + ... + 50780308.

It is an arithmetic number, because the mean of its divisors is an integer number (355462023).

Almost surely, 2^2031211540 is an apocalyptic number.

2031211540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2031211540 is an abundant number, since it is smaller than the sum of its proper divisors (2234332736).

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

2031211540 is a wasteful number, since it uses less digits than its factorization.

2031211540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101560586 (or 101560584 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2031211540 is about 45068.9642658892. The cubic root of 2031211540 is about 1266.4412616764.

Adding to 2031211540 its reverse (451121302), we get a palindrome (2482332842).

The spelling of 2031211540 in words is "two billion, thirty-one million, two hundred eleven thousand, five hundred forty".