521225353 has 4 divisors (see below), whose sum is σ = 568609488. Its totient is φ = 473841220.

The previous prime is 521225291. The next prime is 521225357. The reversal of 521225353 is 353522125.

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 521225353 - 2¹⁷ = 521094281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521225357) 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, 23692051 + ... + 23692072.

It is an arithmetic number, because the mean of its divisors is an integer number (142152372).

Almost surely, 2^521225353 is an apocalyptic number.

It is an amenable number.

521225353 is a deficient number, since it is larger than the sum of its proper divisors (47384135).

521225353 is a wasteful number, since it uses less digits than its factorization.

521225353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47384134.

The product of its digits is 9000, while the sum is 28.

The square root of 521225353 is about 22830.3603344319. The cubic root of 521225353 is about 804.7762983212.

Adding to 521225353 its reverse (353522125), we get a palindrome (874747478).

It can be divided in two parts, 52122 and 5353, that added together give a palindrome (57475).

The spelling of 521225353 in words is "five hundred twenty-one million, two hundred twenty-five thousand, three hundred fifty-three".