2109217425 has 24 divisors (see below), whose sum is σ = 3985417536. Its totient is φ = 964213440.

The previous prime is 2109217399. The next prime is 2109217457. The reversal of 2109217425 is 5247129012.

It is not a de Polignac number, because 2109217425 - 2⁹ = 2109216913 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2008254 + ... + 2009303.

It is an arithmetic number, because the mean of its divisors is an integer number (166059064).

Almost surely, 2^2109217425 is an apocalyptic number.

2109217425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2109217425 is a deficient number, since it is larger than the sum of its proper divisors (1876200111).

2109217425 is a wasteful number, since it uses less digits than its factorization.

2109217425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4017577 (or 4017572 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 2109217425 is about 45926.2171858297. The cubic root of 2109217425 is about 1282.4500244615.

The spelling of 2109217425 in words is "two billion, one hundred nine million, two hundred seventeen thousand, four hundred twenty-five".