521313667 has 8 divisors (see below), whose sum is σ = 604679936. Its totient is φ = 440170632.

The previous prime is 521313649. The next prime is 521313677. The reversal of 521313667 is 766313125.

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 521313667 - 2¹¹ = 521311619 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521313677) 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, 555303 + ... + 556240.

It is an arithmetic number, because the mean of its divisors is an integer number (75584992).

Almost surely, 2^521313667 is an apocalyptic number.

521313667 is a deficient number, since it is larger than the sum of its proper divisors (83366269).

521313667 is a wasteful number, since it uses less digits than its factorization.

521313667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111617.

The product of its digits is 22680, while the sum is 34.

The square root of 521313667 is about 22832.2943875555. The cubic root of 521313667 is about 804.8217482722.

The spelling of 521313667 in words is "five hundred twenty-one million, three hundred thirteen thousand, six hundred sixty-seven".