523212 has 24 divisors (see below), whose sum is σ = 1243200. Its totient is φ = 171216.

The previous prime is 523207. The next prime is 523213. The reversal of 523212 is 212325.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 523191 and 523200.

It is not an unprimeable number, because it can be changed into a prime (523213) by changing a digit.

523212 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 339 + ... + 1077.

It is an arithmetic number, because the mean of its divisors is an integer number (51800).

2⁵²³²¹² is an apocalyptic number.

It is an amenable number.

523212 is an abundant number, since it is smaller than the sum of its proper divisors (719988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

523212 is a wasteful number, since it uses less digits than its factorization.

523212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805 (or 803 counting only the distinct ones).

The product of its digits is 120, while the sum is 15.

The square root of 523212 is about 723.3339477724. Note that the first 3 decimals coincide. The cubic root of 523212 is about 80.5797468544.

Adding to 523212 its reverse (212325), we get a palindrome (735537).

The spelling of 523212 in words is "five hundred twenty-three thousand, two hundred twelve".