2106015220 has 12 divisors (see below), whose sum is σ = 4422632004. Its totient is φ = 842406080.

The previous prime is 2106015167. The next prime is 2106015229. The reversal of 2106015220 is 225106012.

It can be written as a sum of positive squares in 2 ways, for example, as 400160016 + 1705855204 = 20004^2 + 41302^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2106015229) 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, 52650361 + ... + 52650400.

It is an arithmetic number, because the mean of its divisors is an integer number (368552667).

Almost surely, 2^2106015220 is an apocalyptic number.

2106015220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2106015220 is an abundant number, since it is smaller than the sum of its proper divisors (2316616784).

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

2106015220 is a wasteful number, since it uses less digits than its factorization.

2106015220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105300770 (or 105300768 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 2106015220 is about 45891.3414491231. The cubic root of 2106015220 is about 1281.8006923398.

The spelling of 2106015220 in words is "two billion, one hundred six million, fifteen thousand, two hundred twenty".