2103553100 has 72 divisors (see below), whose sum is σ = 4998898800. Its totient is φ = 761977600.

The previous prime is 2103553069. The next prime is 2103553117. The reversal of 2103553100 is 13553012.

It is a super-2 number, since 2×2103553100² = 8849871289039220000, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 292346 + ... + 299454.

It is an arithmetic number, because the mean of its divisors is an integer number (69429150).

Almost surely, 2^2103553100 is an apocalyptic number.

2103553100 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 2103553100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2499449400).

2103553100 is an abundant number, since it is smaller than the sum of its proper divisors (2895345700).

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

2103553100 is a wasteful number, since it uses less digits than its factorization.

2103553100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7403 (or 7396 counting only the distinct ones).

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 2103553100 is about 45864.5080645154. The cubic root of 2103553100 is about 1281.3009843682.

The spelling of 2103553100 in words is "two billion, one hundred three million, five hundred fifty-three thousand, one hundred".