522387 has 6 divisors (see below), whose sum is σ = 754572. Its totient is φ = 348252.

The previous prime is 522383. The next prime is 522391. The reversal of 522387 is 783225.

It is an interprime number because it is at equal distance from previous prime (522383) and next prime (522391).

It is not a de Polignac number, because 522387 - 2² = 522383 is a prime.

It is a d-powerful number, because it can be written as 5⁸ + 2⁸ + 3³ + 2¹⁷ + 8² + 7³ .

It is a nialpdrome in base 9.

It is a self number, because there is not a number n which added to its sum of digits gives 522387.

It is not an unprimeable number, because it can be changed into a prime (522383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29013 + ... + 29030.

It is an arithmetic number, because the mean of its divisors is an integer number (125762).

2⁵²²³⁸⁷ is an apocalyptic number.

522387 is a deficient number, since it is larger than the sum of its proper divisors (232185).

522387 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 11 representation: 522387 = (327528)₁₁.

522387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58049 (or 58046 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 522387 is about 722.7634467791. The cubic root of 522387 is about 80.5373718943.

It can be divided in two parts, 522 and 387, that added together give a palindrome (909).

The spelling of 522387 in words is "five hundred twenty-two thousand, three hundred eighty-seven".