521552089 has 4 divisors (see below), whose sum is σ = 522363856. Its totient is φ = 520740324.

The previous prime is 521552069. The next prime is 521552113. The reversal of 521552089 is 980255125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 521552089 - 2¹¹ = 521550041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521552069) 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, 404919 + ... + 406204.

It is an arithmetic number, because the mean of its divisors is an integer number (130590964).

Almost surely, 2^521552089 is an apocalyptic number.

It is an amenable number.

521552089 is a deficient number, since it is larger than the sum of its proper divisors (811767).

521552089 is an equidigital number, since it uses as much as digits as its factorization.

521552089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 811766.

The product of its (nonzero) digits is 36000, while the sum is 37.

The square root of 521552089 is about 22837.5149479973. The cubic root of 521552089 is about 804.9444242331.

The spelling of 521552089 in words is "five hundred twenty-one million, five hundred fifty-two thousand, eighty-nine".