522648921 has 8 divisors (see below), whose sum is σ = 697141984. Its totient is φ = 348294240.

The previous prime is 522648913. The next prime is 522648923. The reversal of 522648921 is 129846225.

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

It is not a de Polignac number, because 522648921 - 2³ = 522648913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 522648921.

It is not an unprimeable number, because it can be changed into a prime (522648923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25435 + ... + 41136.

It is an arithmetic number, because the mean of its divisors is an integer number (87142748).

Almost surely, 2^522648921 is an apocalyptic number.

It is an amenable number.

522648921 is a deficient number, since it is larger than the sum of its proper divisors (174493063).

522648921 is a wasteful number, since it uses less digits than its factorization.

522648921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69191.

The product of its digits is 69120, while the sum is 39.

The square root of 522648921 is about 22861.5161570706. The cubic root of 522648921 is about 805.5082992732.

The spelling of 522648921 in words is "five hundred twenty-two million, six hundred forty-eight thousand, nine hundred twenty-one".