521671071 has 8 divisors (see below), whose sum is σ = 695689344. Its totient is φ = 347716760.

The previous prime is 521671063. The next prime is 521671081. The reversal of 521671071 is 170176125.

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 521671071 - 2³ = 521671063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521671081) 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, 8326 + ... + 33356.

It is an arithmetic number, because the mean of its divisors is an integer number (86961168).

Almost surely, 2^521671071 is an apocalyptic number.

521671071 is a deficient number, since it is larger than the sum of its proper divisors (174018273).

521671071 is a wasteful number, since it uses less digits than its factorization.

521671071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31981.

The product of its (nonzero) digits is 2940, while the sum is 30.

The square root of 521671071 is about 22840.1197676369. The cubic root of 521671071 is about 805.0056304018.

The spelling of 521671071 in words is "five hundred twenty-one million, six hundred seventy-one thousand, seventy-one".