2251897 has 2 divisors, whose sum is σ = 2251898. Its totient is φ = 2251896.

The previous prime is 2251891. The next prime is 2251901. The reversal of 2251897 is 7981522.

2251897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1527696 + 724201 = 1236^2 + 851^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2251897 is a prime.

It is not a weakly prime, because it can be changed into another prime (2251891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125948 + 1125949.

It is an arithmetic number, because the mean of its divisors is an integer number (1125949).

2^2251897 is an apocalyptic number.

It is an amenable number.

2251897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251897 is an equidigital number, since it uses as much as digits as its factorization.

2251897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 34.

The square root of 2251897 is about 1500.6322001077. The cubic root of 2251897 is about 131.0738856356.

The spelling of 2251897 in words is "two million, two hundred fifty-one thousand, eight hundred ninety-seven".