525316621 has 2 divisors, whose sum is σ = 525316622. Its totient is φ = 525316620.

The previous prime is 525316613. The next prime is 525316651. The reversal of 525316621 is 126613525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525051396 + 265225 = 22914^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 525316621 - 2³ = 525316613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (525316651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262658310 + 262658311.

It is an arithmetic number, because the mean of its divisors is an integer number (262658311).

Almost surely, 2^525316621 is an apocalyptic number.

It is an amenable number.

525316621 is a deficient number, since it is larger than the sum of its proper divisors (1).

525316621 is an equidigital number, since it uses as much as digits as its factorization.

525316621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 31.

The square root of 525316621 is about 22919.7866700369. The cubic root of 525316621 is about 806.8764635618.

The spelling of 525316621 in words is "five hundred twenty-five million, three hundred sixteen thousand, six hundred twenty-one".