521225011 has 8 divisors (see below), whose sum is σ = 549169920. Its totient is φ = 493720392.

The previous prime is 521225009. The next prime is 521225017. The reversal of 521225011 is 110522125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 521225011 - 2¹ = 521225009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 521225011.

It is not an unprimeable number, because it can be changed into a prime (521225017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107641 + ... + 112378.

It is an arithmetic number, because the mean of its divisors is an integer number (68646240).

Almost surely, 2^521225011 is an apocalyptic number.

521225011 is a deficient number, since it is larger than the sum of its proper divisors (27944909).

521225011 is a wasteful number, since it uses less digits than its factorization.

521225011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220145.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 521225011 is about 22830.3528444043. The cubic root of 521225011 is about 804.7761223042.

Adding to 521225011 its reverse (110522125), we get a palindrome (631747136).

The spelling of 521225011 in words is "five hundred twenty-one million, two hundred twenty-five thousand, eleven".