2145340225 has 12 divisors (see below), whose sum is σ = 3040253824. Its totient is φ = 1471090320.

The previous prime is 2145340199. The next prime is 2145340229. The reversal of 2145340225 is 5220435412.

It is not a de Polignac number, because 2145340225 - 2⁷ = 2145340097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145340193 and 2145340202.

It is not an unprimeable number, because it can be changed into a prime (2145340229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6129369 + ... + 6129718.

Almost surely, 2^2145340225 is an apocalyptic number.

2145340225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2145340225 is a deficient number, since it is larger than the sum of its proper divisors (894913599).

2145340225 is a wasteful number, since it uses less digits than its factorization.

2145340225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12259104 (or 12259099 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 2145340225 is about 46317.8175759610. The cubic root of 2145340225 is about 1289.7297723335.

Adding to 2145340225 its reverse (5220435412), we get a palindrome (7365775637).

The spelling of 2145340225 in words is "two billion, one hundred forty-five million, three hundred forty thousand, two hundred twenty-five".