521522052 has 72 divisors (see below), whose sum is σ = 1277740800. Its totient is φ = 165381120.

The previous prime is 521522003. The next prime is 521522059. The reversal of 521522052 is 250225125.

It is not an unprimeable number, because it can be changed into a prime (521522059) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3500074 + ... + 3500222.

It is an arithmetic number, because the mean of its divisors is an integer number (17746400).

Almost surely, 2^521522052 is an apocalyptic number.

It is an amenable number.

521522052 is an abundant number, since it is smaller than the sum of its proper divisors (756218748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521522052 is a wasteful number, since it uses less digits than its factorization.

521522052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 521522052 is about 22836.8573144380. The cubic root of 521522052 is about 804.9289712673.

Adding to 521522052 its reverse (250225125), we get a palindrome (771747177).

The spelling of 521522052 in words is "five hundred twenty-one million, five hundred twenty-two thousand, fifty-two".