2251517 has 2 divisors, whose sum is σ = 2251518. Its totient is φ = 2251516.

The previous prime is 2251511. The next prime is 2251547. The reversal of 2251517 is 7151522.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1466521 + 784996 = 1211^2 + 886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2251517 is a prime.

It is an Ulam number.

It is equal to p₁₆₆₁₇₂ and since 2251517 and 166172 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 2251492 and 2251501.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2251511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1125758 + 1125759.

It is an arithmetic number, because the mean of its divisors is an integer number (1125759).

2^2251517 is an apocalyptic number.

It is an amenable number.

2251517 is a deficient number, since it is larger than the sum of its proper divisors (1).

2251517 is an equidigital number, since it uses as much as digits as its factorization.

2251517 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 700, while the sum is 23.

The square root of 2251517 is about 1500.5055814625. The cubic root of 2251517 is about 131.0665124626.

The spelling of 2251517 in words is "two million, two hundred fifty-one thousand, five hundred seventeen".