521883487 has 4 divisors (see below), whose sum is σ = 530439016. Its totient is φ = 513327960.

The previous prime is 521883407. The next prime is 521883511. The reversal of 521883487 is 784388125.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521883487 - 2¹¹ = 521881439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521883407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4277673 + ... + 4277794.

It is an arithmetic number, because the mean of its divisors is an integer number (132609754).

Almost surely, 2^521883487 is an apocalyptic number.

521883487 is a deficient number, since it is larger than the sum of its proper divisors (8555529).

521883487 is an equidigital number, since it uses as much as digits as its factorization.

521883487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8555528.

The product of its digits is 430080, while the sum is 46.

The square root of 521883487 is about 22844.7693575575. The cubic root of 521883487 is about 805.1148773212.

The spelling of 521883487 in words is "five hundred twenty-one million, eight hundred eighty-three thousand, four hundred eighty-seven".