2251604417 has 2 divisors, whose sum is σ = 2251604418. Its totient is φ = 2251604416.

The previous prime is 2251604393. The next prime is 2251604473. The reversal of 2251604417 is 7144061522.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2082188161 + 169416256 = 45631^2 + 13016^2 .

It is a cyclic number.

It is not a de Polignac number, because 2251604417 - 2⁸ = 2251604161 is a prime.

It is not a weakly prime, because it can be changed into another prime (2251604917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125802208 + 1125802209.

It is an arithmetic number, because the mean of its divisors is an integer number (1125802209).

Almost surely, 2^2251604417 is an apocalyptic number.

It is an amenable number.

2251604417 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251604417 is an equidigital number, since it uses as much as digits as its factorization.

2251604417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 2251604417 is about 47451.0739288375. The cubic root of 2251604417 is about 1310.6820869567.

Adding to 2251604417 its reverse (7144061522), we get a palindrome (9395665939).

The spelling of 2251604417 in words is "two billion, two hundred fifty-one million, six hundred four thousand, four hundred seventeen".