2101655225 has 12 divisors (see below), whose sum is σ = 2650224720. Its totient is φ = 1652826000.

The previous prime is 2101655207. The next prime is 2101655267. The reversal of 2101655225 is 5225561012.

It is not a de Polignac number, because 2101655225 - 2¹⁶ = 2101589689 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 710951 + ... + 713900.

It is an arithmetic number, because the mean of its divisors is an integer number (220852060).

Almost surely, 2^2101655225 is an apocalyptic number.

2101655225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2101655225 is a deficient number, since it is larger than the sum of its proper divisors (548569495).

2101655225 is a wasteful number, since it uses less digits than its factorization.

2101655225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1424920 (or 1424915 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 29.

The square root of 2101655225 is about 45843.8133775976. The cubic root of 2101655225 is about 1280.9155284777.

The spelling of 2101655225 in words is "two billion, one hundred one million, six hundred fifty-five thousand, two hundred twenty-five".