525361861 has 2 divisors, whose sum is σ = 525361862. Its totient is φ = 525361860.

The previous prime is 525361849. The next prime is 525361943. The reversal of 525361861 is 168163525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338192100 + 187169761 = 18390^2 + 13681^2 .

It is a cyclic number.

It is not a de Polignac number, because 525361861 - 2⁹ = 525361349 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 525361861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525362861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262680930 + 262680931.

It is an arithmetic number, because the mean of its divisors is an integer number (262680931).

Almost surely, 2^525361861 is an apocalyptic number.

It is an amenable number.

525361861 is a deficient number, since it is larger than the sum of its proper divisors (1).

525361861 is an equidigital number, since it uses as much as digits as its factorization.

525361861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 43200, while the sum is 37.

The square root of 525361861 is about 22920.7735689701. The cubic root of 525361861 is about 806.8996254936.

The spelling of 525361861 in words is "five hundred twenty-five million, three hundred sixty-one thousand, eight hundred sixty-one".