2151110900 has 18 divisors (see below), whose sum is σ = 4667910870. Its totient is φ = 860444320.

The previous prime is 2151110881. The next prime is 2151110933. The reversal of 2151110900 is 90111512.

It can be written as a sum of positive squares in 3 ways, for example, as 607721104 + 1543389796 = 24652^2 + 39286^2 .

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10755455 + ... + 10755654.

Almost surely, 2^2151110900 is an apocalyptic number.

2151110900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2151110900 is an abundant number, since it is smaller than the sum of its proper divisors (2516799970).

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

2151110900 is a wasteful number, since it uses less digits than its factorization.

2151110900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21511123 (or 21511116 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 20.

The square root of 2151110900 is about 46380.0700732545. The cubic root of 2151110900 is about 1290.8851365684.

The spelling of 2151110900 in words is "two billion, one hundred fifty-one million, one hundred ten thousand, nine hundred".