525817813 has 2 divisors, whose sum is σ = 525817814. Its totient is φ = 525817812.

The previous prime is 525817793. The next prime is 525817829. The reversal of 525817813 is 318718525.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 318515409 + 207302404 = 17847^2 + 14398^2 .

It is a cyclic number.

It is not a de Polignac number, because 525817813 - 2¹³ = 525809621 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525817883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262908906 + 262908907.

It is an arithmetic number, because the mean of its divisors is an integer number (262908907).

Almost surely, 2^525817813 is an apocalyptic number.

It is an amenable number.

525817813 is a deficient number, since it is larger than the sum of its proper divisors (1).

525817813 is an equidigital number, since it uses as much as digits as its factorization.

525817813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 40.

The square root of 525817813 is about 22930.7176730254. The cubic root of 525817813 is about 807.1329891637.

The spelling of 525817813 in words is "five hundred twenty-five million, eight hundred seventeen thousand, eight hundred thirteen".