2103165540 has 384 divisors, whose sum is σ = 8267857920. Its totient is φ = 432470016.

The previous prime is 2103165511. The next prime is 2103165587. The reversal of 2103165540 is 455613012.

2103165540 is a `hidden beast` number, since 2 + 1 + 0 + 3 + 1 + 655 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1477269 + ... + 1478691.

It is an arithmetic number, because the mean of its divisors is an integer number (21530880).

Almost surely, 2^2103165540 is an apocalyptic number.

2103165540 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 2103165540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4133928960).

2103165540 is an abundant number, since it is smaller than the sum of its proper divisors (6164692380).

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

2103165540 is a wasteful number, since it uses less digits than its factorization.

2103165540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1488 (or 1480 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 2103165540 is about 45860.2828163979. The cubic root of 2103165540 is about 1281.2222902911. Note that the first 4 decimals are identical.

Adding to 2103165540 its reverse (455613012), we get a palindrome (2558778552).

The spelling of 2103165540 in words is "two billion, one hundred three million, one hundred sixty-five thousand, five hundred forty".