521113 has 4 divisors (see below), whose sum is σ = 548560. Its totient is φ = 493668.

The previous prime is 521107. The next prime is 521119. The reversal of 521113 is 311125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (521107) and next prime (521119).

It is a cyclic number.

It is not a de Polignac number, because 521113 - 2¹³ = 512921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521093 and 521102.

It is not an unprimeable number, because it can be changed into a prime (521119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13695 + ... + 13732.

It is an arithmetic number, because the mean of its divisors is an integer number (137140).

2⁵²¹¹¹³ is an apocalyptic number.

It is an amenable number.

521113 is a deficient number, since it is larger than the sum of its proper divisors (27447).

521113 is a wasteful number, since it uses less digits than its factorization.

521113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27446.

The product of its digits is 30, while the sum is 13.

The square root of 521113 is about 721.8815692342. The cubic root of 521113 is about 80.4718469509.

Adding to 521113 its reverse (311125), we get a palindrome (832238).

The spelling of 521113 in words is "five hundred twenty-one thousand, one hundred thirteen".