521413233 has 16 divisors (see below), whose sum is σ = 762240000. Its totient is φ = 314416080.

The previous prime is 521413223. The next prime is 521413259. The reversal of 521413233 is 332314125.

It is not a de Polignac number, because 521413233 - 2²⁴ = 504636017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (521413223) 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 15 ways as a sum of consecutive naturals, for example, 33133 + ... + 46266.

It is an arithmetic number, because the mean of its divisors is an integer number (47640000).

Almost surely, 2^521413233 is an apocalyptic number.

It is an amenable number.

521413233 is a deficient number, since it is larger than the sum of its proper divisors (240826767).

521413233 is a wasteful number, since it uses less digits than its factorization.

521413233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79612.

The product of its digits is 2160, while the sum is 24.

The square root of 521413233 is about 22834.4746600398. The cubic root of 521413233 is about 804.8729828016.

Adding to 521413233 its reverse (332314125), we get a palindrome (853727358).

The spelling of 521413233 in words is "five hundred twenty-one million, four hundred thirteen thousand, two hundred thirty-three".