521795527 has 4 divisors (see below), whose sum is σ = 569231496. Its totient is φ = 474359560.

The previous prime is 521795513. The next prime is 521795557. The reversal of 521795527 is 725597125.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 521795527 - 2¹⁹ = 521271239 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 (521795557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23717968 + ... + 23717989.

It is an arithmetic number, because the mean of its divisors is an integer number (142307874).

Almost surely, 2^521795527 is an apocalyptic number.

521795527 is a deficient number, since it is larger than the sum of its proper divisors (47435969).

521795527 is a wasteful number, since it uses less digits than its factorization.

521795527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47435968.

The product of its digits is 220500, while the sum is 43.

The square root of 521795527 is about 22842.8441092610. The cubic root of 521795527 is about 805.0696425224.

The spelling of 521795527 in words is "five hundred twenty-one million, seven hundred ninety-five thousand, five hundred twenty-seven".