521053521 has 8 divisors (see below), whose sum is σ = 706127424. Its totient is φ = 341674320.

The previous prime is 521053493. The next prime is 521053531. The reversal of 521053521 is 125350125.

It is a happy number.

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

It is not a de Polignac number, because 521053521 - 2⁶ = 521053457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 521053491 and 521053500.

It is not an unprimeable number, because it can be changed into a prime (521053531) 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, 1423461 + ... + 1423826.

It is an arithmetic number, because the mean of its divisors is an integer number (88265928).

Almost surely, 2^521053521 is an apocalyptic number.

It is an amenable number.

521053521 is a deficient number, since it is larger than the sum of its proper divisors (185073903).

521053521 is a wasteful number, since it uses less digits than its factorization.

521053521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2847351.

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 521053521 is about 22826.5967897100. The cubic root of 521053521 is about 804.6878519200.

The spelling of 521053521 in words is "five hundred twenty-one million, fifty-three thousand, five hundred twenty-one".