2103155440 has 40 divisors (see below), whose sum is σ = 4944795120. Its totient is φ = 831806976.

The previous prime is 2103155437. The next prime is 2103155491. The reversal of 2103155440 is 445513012.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140574 + ... + 154813.

It is an arithmetic number, because the mean of its divisors is an integer number (123619878).

Almost surely, 2^2103155440 is an apocalyptic number.

2103155440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2103155440 is an abundant number, since it is smaller than the sum of its proper divisors (2841639680).

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

2103155440 is a wasteful number, since it uses less digits than its factorization.

2103155440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295489 (or 295483 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 2103155440 is about 45860.1726991951. The cubic root of 2103155440 is about 1281.2202393563.

Adding to 2103155440 its reverse (445513012), we get a palindrome (2548668452).

The spelling of 2103155440 in words is "two billion, one hundred three million, one hundred fifty-five thousand, four hundred forty".