521677480 has 16 divisors (see below), whose sum is σ = 1173774420. Its totient is φ = 208670976.

The previous prime is 521677451. The next prime is 521677511. The reversal of 521677480 is 84776125.

It can be written as a sum of positive squares in 2 ways, for example, as 505980036 + 15697444 = 22494^2 + 3962^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 13041937 = 521677480 / (5 + 2 + 1 + 6 + 7 + 7 + 4 + 8 + 0).

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 3 ways as a sum of consecutive naturals, for example, 6520929 + ... + 6521008.

Almost surely, 2^521677480 is an apocalyptic number.

It is an amenable number.

521677480 is an abundant number, since it is smaller than the sum of its proper divisors (652096940).

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

521677480 is a wasteful number, since it uses less digits than its factorization.

521677480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13041948 (or 13041944 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 521677480 is about 22840.2600685719. The cubic root of 521677480 is about 805.0089270257.

The spelling of 521677480 in words is "five hundred twenty-one million, six hundred seventy-seven thousand, four hundred eighty".