525362821 has 4 divisors (see below), whose sum is σ = 526286700. Its totient is φ = 524438944.

The previous prime is 525362809. The next prime is 525362833. The reversal of 525362821 is 128263525.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (525362809) and next prime (525362833).

It can be written as a sum of positive squares in 2 ways, for example, as 75498721 + 449864100 = 8689^2 + 21210^2 .

It is a cyclic number.

It is not a de Polignac number, because 525362821 - 2¹⁵ = 525330053 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525362861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 461086 + ... + 462223.

It is an arithmetic number, because the mean of its divisors is an integer number (131571675).

Almost surely, 2^525362821 is an apocalyptic number.

It is an amenable number.

525362821 is a deficient number, since it is larger than the sum of its proper divisors (923879).

525362821 is an equidigital number, since it uses as much as digits as its factorization.

525362821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923878.

The product of its digits is 28800, while the sum is 34.

The square root of 525362821 is about 22920.7945106621. The cubic root of 525362821 is about 806.9001169791.

The spelling of 525362821 in words is "five hundred twenty-five million, three hundred sixty-two thousand, eight hundred twenty-one".