521213 has 12 divisors (see below), whose sum is σ = 662112. Its totient is φ = 405720.

The previous prime is 521201. The next prime is 521231. The reversal of 521213 is 312125.

It is a happy number.

It is not a de Polignac number, because 521213 - 2⁸ = 520957 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521243) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56 + ... + 1022.

It is an arithmetic number, because the mean of its divisors is an integer number (55176).

2⁵²¹²¹³ is an apocalyptic number.

It is an amenable number.

521213 is a deficient number, since it is larger than the sum of its proper divisors (140899).

521213 is a wasteful number, since it uses less digits than its factorization.

521213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 985 counting only the distinct ones).

The product of its digits is 60, while the sum is 14.

The square root of 521213 is about 721.9508293506. The cubic root of 521213 is about 80.4769940559.

Adding to 521213 its reverse (312125), we get a palindrome (833338).

It can be divided in two parts, 5212 and 13, that added together give a palindrome (5225).

The spelling of 521213 in words is "five hundred twenty-one thousand, two hundred thirteen".