521549971 has 8 divisors (see below), whose sum is σ = 534762144. Its totient is φ = 508361280.

The previous prime is 521549969. The next prime is 521550013. The reversal of 521549971 is 179945125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 521549971 - 2¹ = 521549969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521549471) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44490 + ... + 54976.

It is an arithmetic number, because the mean of its divisors is an integer number (66845268).

Almost surely, 2^521549971 is an apocalyptic number.

521549971 is a deficient number, since it is larger than the sum of its proper divisors (13212173).

521549971 is a wasteful number, since it uses less digits than its factorization.

521549971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11741.

The product of its digits is 113400, while the sum is 43.

The square root of 521549971 is about 22837.4685768804. The cubic root of 521549971 is about 804.9433346171.

The spelling of 521549971 in words is "five hundred twenty-one million, five hundred forty-nine thousand, nine hundred seventy-one".