525298821 has 4 divisors (see below), whose sum is σ = 700398432. Its totient is φ = 350199212.

The previous prime is 525298819. The next prime is 525298831. The reversal of 525298821 is 128892525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 525298821 - 2¹ = 525298819 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525298801) 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 in 3 ways as a sum of consecutive naturals, for example, 87549801 + ... + 87549806.

It is an arithmetic number, because the mean of its divisors is an integer number (175099608).

Almost surely, 2^525298821 is an apocalyptic number.

It is an amenable number.

525298821 is a deficient number, since it is larger than the sum of its proper divisors (175099611).

525298821 is a wasteful number, since it uses less digits than its factorization.

525298821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175099610.

The product of its digits is 115200, while the sum is 42.

The square root of 525298821 is about 22919.3983559778. The cubic root of 525298821 is about 806.8673499703.

The spelling of 525298821 in words is "five hundred twenty-five million, two hundred ninety-eight thousand, eight hundred twenty-one".