521321480 has 32 divisors (see below), whose sum is σ = 1173663000. Its totient is φ = 208406016.

The previous prime is 521321467. The next prime is 521321531. The reversal of 521321480 is 84123125.

It can be written as a sum of positive squares in 4 ways, for example, as 377369476 + 143952004 = 19426^2 + 11998^2 .

It is a super-3 number, since 3×521321480³ (a number of 27 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99404 + ... + 104516.

Almost surely, 2^521321480 is an apocalyptic number.

It is an amenable number.

521321480 is an abundant number, since it is smaller than the sum of its proper divisors (652341520).

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

521321480 is a wasteful number, since it uses less digits than its factorization.

521321480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7673 (or 7669 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 521321480 is about 22832.4654822908. The cubic root of 521321480 is about 804.8257689104.

The spelling of 521321480 in words is "five hundred twenty-one million, three hundred twenty-one thousand, four hundred eighty".