2251504065 has 32 divisors (see below), whose sum is σ = 3666539520. Its totient is φ = 1179590336.

The previous prime is 2251504061. The next prime is 2251504091. The reversal of 2251504065 is 5604051522.

It is a cyclic number.

It is not a de Polignac number, because 2251504065 - 2² = 2251504061 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2251504061) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217804 + ... + 227906.

It is an arithmetic number, because the mean of its divisors is an integer number (114579360).

Almost surely, 2^2251504065 is an apocalyptic number.

It is an amenable number.

2251504065 is a deficient number, since it is larger than the sum of its proper divisors (1415035455).

2251504065 is a wasteful number, since it uses less digits than its factorization.

2251504065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10373.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 2251504065 is about 47450.0164910403. The cubic root of 2251504065 is about 1310.6626146903.

Adding to 2251504065 its reverse (5604051522), we get a palindrome (7855555587).

The spelling of 2251504065 in words is "two billion, two hundred fifty-one million, five hundred four thousand, sixty-five".