521424353 has 4 divisors (see below), whose sum is σ = 548867760. Its totient is φ = 493980948.

The previous prime is 521424331. The next prime is 521424367. The reversal of 521424353 is 353424125.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 521424353 - 2¹² = 521420257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (521424383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13721675 + ... + 13721712.

It is an arithmetic number, because the mean of its divisors is an integer number (137216940).

Almost surely, 2^521424353 is an apocalyptic number.

It is an amenable number.

521424353 is a deficient number, since it is larger than the sum of its proper divisors (27443407).

521424353 is a wasteful number, since it uses less digits than its factorization.

521424353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27443406.

The product of its digits is 14400, while the sum is 29.

The square root of 521424353 is about 22834.7181502203. The cubic root of 521424353 is about 804.8787045103.

Adding to 521424353 its reverse (353424125), we get a palindrome (874848478).

The spelling of 521424353 in words is "five hundred twenty-one million, four hundred twenty-four thousand, three hundred fifty-three".