522381 has 16 divisors (see below), whose sum is σ = 741888. Its totient is φ = 326400.

The previous prime is 522373. The next prime is 522383. The reversal of 522381 is 183225.

It is not a de Polignac number, because 522381 - 2³ = 522373 is a prime.

It is a super-2 number, since 2×522381² = 545763818322, which contains 22 as substring.

522381 is a lucky number.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3745 + ... + 3881.

It is an arithmetic number, because the mean of its divisors is an integer number (46368).

2⁵²²³⁸¹ is an apocalyptic number.

It is an amenable number.

522381 is a deficient number, since it is larger than the sum of its proper divisors (219507).

522381 is a wasteful number, since it uses less digits than its factorization.

522381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212.

The product of its digits is 480, while the sum is 21.

The square root of 522381 is about 722.7592960315. The cubic root of 522381 is about 80.5370635494.

It can be divided in two parts, 522 and 381, that added together give a triangular number (903 = T₄₂).

The spelling of 522381 in words is "five hundred twenty-two thousand, three hundred eighty-one".