2065440251 has 8 divisors (see below), whose sum is σ = 2369027040. Its totient is φ = 1763984448.

The previous prime is 2065440241. The next prime is 2065440281. The reversal of 2065440251 is 1520445602.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2065440251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2065440241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 530666 + ... + 534543.

It is an arithmetic number, because the mean of its divisors is an integer number (296128380).

Almost surely, 2^2065440251 is an apocalyptic number.

2065440251 is a deficient number, since it is larger than the sum of its proper divisors (303586789).

2065440251 is a wasteful number, since it uses less digits than its factorization.

2065440251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065493.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 2065440251 is about 45447.1148809251. The cubic root of 2065440251 is about 1273.5154323614.

Adding to 2065440251 its reverse (1520445602), we get a palindrome (3585885853).

The spelling of 2065440251 in words is "two billion, sixty-five million, four hundred forty thousand, two hundred fifty-one".