520421552 has 200 divisors, whose sum is σ = 1333724160. Its totient is φ = 195592320.

The previous prime is 520421543. The next prime is 520421563. The reversal of 520421552 is 255124025.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 16787777 + ... + 16787807.

Almost surely, 2^520421552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520421552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (666862080).

520421552 is an abundant number, since it is smaller than the sum of its proper divisors (813302608).

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

520421552 is a wasteful number, since it uses less digits than its factorization.

520421552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 520421552 is about 22812.7497684957. The cubic root of 520421552 is about 804.3623936631.

Adding to 520421552 its reverse (255124025), we get a palindrome (775545577).

The spelling of 520421552 in words is "five hundred twenty million, four hundred twenty-one thousand, five hundred fifty-two".