521085971 has 8 divisors (see below), whose sum is σ = 596404224. Its totient is φ = 445987080.

The previous prime is 521085959. The next prime is 521085977. The reversal of 521085971 is 179580125.

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

It is not a de Polignac number, because 521085971 - 2¹⁴ = 521069587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521085977) 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, 49715 + ... + 59276.

It is an arithmetic number, because the mean of its divisors is an integer number (74550528).

Almost surely, 2^521085971 is an apocalyptic number.

521085971 is a deficient number, since it is larger than the sum of its proper divisors (75318253).

521085971 is a wasteful number, since it uses less digits than its factorization.

521085971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109681.

The product of its (nonzero) digits is 25200, while the sum is 38.

The square root of 521085971 is about 22827.3075722916. The cubic root of 521085971 is about 804.7045562685.

The spelling of 521085971 in words is "five hundred twenty-one million, eighty-five thousand, nine hundred seventy-one".