522369 has 10 divisors (see below), whose sum is σ = 780450. Its totient is φ = 348192.

The previous prime is 522337. The next prime is 522371. The reversal of 522369 is 963225.

It can be written as a sum of positive squares in only one way, i.e., 518400 + 3969 = 720^2 + 63^2 .

It is not a de Polignac number, because 522369 - 2⁵ = 522337 is a prime.

It is a super-2 number, since 2×522369² = 545738744322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a nialpdrome in base 9 and base 14.

It is not an unprimeable number, because it can be changed into a prime (522469) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 3144 + ... + 3305.

It is an arithmetic number, because the mean of its divisors is an integer number (78045).

2⁵²²³⁶⁹ is an apocalyptic number.

It is an amenable number.

522369 is a deficient number, since it is larger than the sum of its proper divisors (258081).

522369 is an equidigital number, since it uses as much as digits as its factorization.

522369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6461 (or 6452 counting only the distinct ones).

The product of its digits is 3240, while the sum is 27.

The square root of 522369 is about 722.7509944649. The cubic root of 522369 is about 80.5364468526.

The spelling of 522369 in words is "five hundred twenty-two thousand, three hundred sixty-nine".