521612440773271 has 8 divisors (see below), whose sum is σ = 522165574945584. Its totient is φ = 521059311516480.

The previous prime is 521612440773241. The next prime is 521612440773299. The reversal of 521612440773271 is 172377044216125.

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 521612440773271 - 2¹⁹ = 521612440248983 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 (521612440773241) 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, 235211691 + ... + 237418963.

It is an arithmetic number, because the mean of its divisors is an integer number (65270696868198).

Almost surely, 2^{521612440773271} is an apocalyptic number.

521612440773271 is a deficient number, since it is larger than the sum of its proper divisors (553134172313).

521612440773271 is a wasteful number, since it uses less digits than its factorization.

521612440773271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457761.

The product of its (nonzero) digits is 3951360, while the sum is 52.

Adding to 521612440773271 its reverse (172377044216125), we get a palindrome (693989484989396).

The spelling of 521612440773271 in words is "five hundred twenty-one trillion, six hundred twelve billion, four hundred forty million, seven hundred seventy-three thousand, two hundred seventy-one".