2100761225 has 6 divisors (see below), whose sum is σ = 2604943950. Its totient is φ = 1680608960.

The previous prime is 2100761203. The next prime is 2100761233. The reversal of 2100761225 is 5221670012.

It can be written as a sum of positive squares in 3 ways, for example, as 620358649 + 1480402576 = 24907^2 + 38476^2 .

It is not a de Polignac number, because 2100761225 - 2²⁰ = 2099712649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2100761194 and 2100761203.

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, 42015200 + ... + 42015249.

It is an arithmetic number, because the mean of its divisors is an integer number (434157325).

Almost surely, 2^2100761225 is an apocalyptic number.

2100761225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2100761225 is a deficient number, since it is larger than the sum of its proper divisors (504182725).

2100761225 is an equidigital number, since it uses as much as digits as its factorization.

2100761225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84030459 (or 84030454 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 2100761225 is about 45834.0618426951. The cubic root of 2100761225 is about 1280.7338778626.

The spelling of 2100761225 in words is "two billion, one hundred million, seven hundred sixty-one thousand, two hundred twenty-five".