2105251988 has 12 divisors (see below), whose sum is σ = 4210504032. Its totient is φ = 902250840.

The previous prime is 2105251987. The next prime is 2105251997. The reversal of 2105251988 is 8891525012.

2105251988 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2105251987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37593758 + ... + 37593813.

It is an arithmetic number, because the mean of its divisors is an integer number (350875336).

Almost surely, 2^2105251988 is an apocalyptic number.

2105251988 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2105251988 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2105251988 is a wasteful number, since it uses less digits than its factorization.

2105251988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75187582 (or 75187580 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 41.

The square root of 2105251988 is about 45883.0250528450. The cubic root of 2105251988 is about 1281.6458296553.

The spelling of 2105251988 in words is "two billion, one hundred five million, two hundred fifty-one thousand, nine hundred eighty-eight".