2105549140 has 24 divisors (see below), whose sum is σ = 4564288512. Its totient is φ = 815051040.

The previous prime is 2105549123. The next prime is 2105549141. The reversal of 2105549140 is 419455012.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105549141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1697404 + ... + 1698643.

It is an arithmetic number, because the mean of its divisors is an integer number (190178688).

Almost surely, 2^2105549140 is an apocalyptic number.

2105549140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2105549140 is an abundant number, since it is smaller than the sum of its proper divisors (2458739372).

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

2105549140 is a wasteful number, since it uses less digits than its factorization.

2105549140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3396087 (or 3396085 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 2105549140 is about 45886.2630860261. The cubic root of 2105549140 is about 1281.7061273784.

The spelling of 2105549140 in words is "two billion, one hundred five million, five hundred forty-nine thousand, one hundred forty".