2103311540 has 36 divisors (see below), whose sum is σ = 4855004868. Its totient is φ = 764839680.

The previous prime is 2103311531. The next prime is 2103311569. The reversal of 2103311540 is 451133012.

It can be written as a sum of positive squares in 2 ways, for example, as 993888676 + 1109422864 = 31526^2 + 33308^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432149 + ... + 436988.

Almost surely, 2^2103311540 is an apocalyptic number.

2103311540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2103311540 is an abundant number, since it is smaller than the sum of its proper divisors (2751693328).

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

2103311540 is a wasteful number, since it uses less digits than its factorization.

2103311540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869168 (or 869155 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 2103311540 is about 45861.8745800910. The cubic root of 2103311540 is about 1281.2519367331.

Adding to 2103311540 its reverse (451133012), we get a palindrome (2554444552).

The spelling of 2103311540 in words is "two billion, one hundred three million, three hundred eleven thousand, five hundred forty".