2091415825 has 6 divisors (see below), whose sum is σ = 2593355654. Its totient is φ = 1673132640.

The previous prime is 2091415801. The next prime is 2091415853. The reversal of 2091415825 is 5285141902.

It is a Cunningham number, because it is equal to 45732²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 2091415824 = 1^2 + 45732^2 .

It is not a de Polignac number, because 2091415825 - 2⁵ = 2091415793 is a prime.

It is a Duffinian number.

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, 41828292 + ... + 41828341.

Almost surely, 2^2091415825 is an apocalyptic number.

2091415825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2091415825 is a deficient number, since it is larger than the sum of its proper divisors (501939829).

2091415825 is an equidigital number, since it uses as much as digits as its factorization.

2091415825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83656643 (or 83656638 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 37.

The square root of 2091415825 is about 45732.0000109333. Note that the first 4 decimals coincide. The cubic root of 2091415825 is about 1278.8319065624.

The spelling of 2091415825 in words is "two billion, ninety-one million, four hundred fifteen thousand, eight hundred twenty-five".