520421332 has 6 divisors (see below), whose sum is σ = 910737338. Its totient is φ = 260210664.

The previous prime is 520421311. The next prime is 520421333. The reversal of 520421332 is 233124025.

It can be written as a sum of positive squares in only one way, i.e., 403045776 + 117375556 = 20076^2 + 10834^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520421333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65052663 + ... + 65052670.

Almost surely, 2^520421332 is an apocalyptic number.

It is an amenable number.

520421332 is a deficient number, since it is larger than the sum of its proper divisors (390316006).

520421332 is a wasteful number, since it uses less digits than its factorization.

520421332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130105337 (or 130105335 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 520421332 is about 22812.7449466302. The cubic root of 520421332 is about 804.3622803193.

Adding to 520421332 its reverse (233124025), we get a palindrome (753545357).

The spelling of 520421332 in words is "five hundred twenty million, four hundred twenty-one thousand, three hundred thirty-two".