521533834 has 4 divisors (see below), whose sum is σ = 782300754. Its totient is φ = 260766916.

The previous prime is 521533813. The next prime is 521533841. The reversal of 521533834 is 438335125.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 479478609 + 42055225 = 21897^2 + 6485^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 521533834.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130383457 + ... + 130383460.

Almost surely, 2^521533834 is an apocalyptic number.

521533834 is a deficient number, since it is larger than the sum of its proper divisors (260766920).

521533834 is a wasteful number, since it uses less digits than its factorization.

521533834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260766919.

The product of its digits is 43200, while the sum is 34.

The square root of 521533834 is about 22837.1152731688. The cubic root of 521533834 is about 804.9350327571.

Adding to 521533834 its reverse (438335125), we get a palindrome (959868959).

The spelling of 521533834 in words is "five hundred twenty-one million, five hundred thirty-three thousand, eight hundred thirty-four".