2217539 has 2 divisors, whose sum is σ = 2217540. Its totient is φ = 2217538.

The previous prime is 2217503. The next prime is 2217541. The reversal of 2217539 is 9357122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2217539 - 2⁸ = 2217283 is a prime.

Together with 2217541, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2217569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1108769 + 1108770.

It is an arithmetic number, because the mean of its divisors is an integer number (1108770).

2^2217539 is an apocalyptic number.

2217539 is a deficient number, since it is larger than the sum of its proper divisors (1).

2217539 is an equidigital number, since it uses as much as digits as its factorization.

2217539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 29.

The square root of 2217539 is about 1489.1403560444. The cubic root of 2217539 is about 130.4038525905.

The spelling of 2217539 in words is "two million, two hundred seventeen thousand, five hundred thirty-nine".