825217511 has 2 divisors, whose sum is σ = 825217512. Its totient is φ = 825217510.

The previous prime is 825217501. The next prime is 825217513. The reversal of 825217511 is 115712528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 825217511 - 2⁶ = 825217447 is a prime.

It is a super-2 number, since 2×825217511² = 1361967880922070242, which contains 22 as substring.

Together with 825217513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (825217513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 412608755 + 412608756.

It is an arithmetic number, because the mean of its divisors is an integer number (412608756).

Almost surely, 2^825217511 is an apocalyptic number.

825217511 is a deficient number, since it is larger than the sum of its proper divisors (1).

825217511 is an equidigital number, since it uses as much as digits as its factorization.

825217511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5600, while the sum is 32.

The square root of 825217511 is about 28726.5993636560. The cubic root of 825217511 is about 937.9711451337.

The spelling of 825217511 in words is "eight hundred twenty-five million, two hundred seventeen thousand, five hundred eleven".