521985541 has 8 divisors (see below), whose sum is σ = 650787264. Its totient is φ = 406741920.

The previous prime is 521985523. The next prime is 521985599. The reversal of 521985541 is 145589125.

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 521985541 - 2¹⁹ = 521461253 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521985494 and 521985503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521985521) 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, 3389440 + ... + 3389593.

It is an arithmetic number, because the mean of its divisors is an integer number (81348408).

Almost surely, 2^521985541 is an apocalyptic number.

It is an amenable number.

521985541 is a deficient number, since it is larger than the sum of its proper divisors (128801723).

521985541 is a wasteful number, since it uses less digits than its factorization.

521985541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6779051.

The product of its digits is 72000, while the sum is 40.

The square root of 521985541 is about 22847.0028887817. The cubic root of 521985541 is about 805.1673538097.

The spelling of 521985541 in words is "five hundred twenty-one million, nine hundred eighty-five thousand, five hundred forty-one".