2109105625 has 45 divisors (see below), whose sum is σ = 2914364761. Its totient is φ = 1524710000.

The previous prime is 2109105617. The next prime is 2109105703. The reversal of 2109105625 is 5265019012.

The square root of 2109105625 is 45925.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 165353881 + 1943751744 = 12859^2 + 44088^2 .

It is not a de Polignac number, because 2109105625 - 2³ = 2109105617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 12629292 + ... + 12629458.

Almost surely, 2^2109105625 is an apocalyptic number.

2109105625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2109105625 is the 45925-th square number.

2109105625 is the 22963-rd centered octagonal number.

It is an amenable number.

2109105625 is a deficient number, since it is larger than the sum of its proper divisors (805259136).

2109105625 is an frugal number, since it uses more digits than its factorization.

2109105625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 31.

The cubic root of 2109105625 is about 1282.4273651181.

The spelling of 2109105625 in words is "two billion, one hundred nine million, one hundred five thousand, six hundred twenty-five".