521700670051 has 8 divisors (see below), whose sum is σ = 569168194608. Its totient is φ = 474239844000.

The previous prime is 521700670039. The next prime is 521700670081. The reversal of 521700670051 is 150076007125.

It is a happy number.

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 521700670051 - 2⁷ = 521700669923 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 521700669989 and 521700670016.

It is not an unprimeable number, because it can be changed into a prime (521700670081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1511080 + ... + 1823941.

It is an arithmetic number, because the mean of its divisors is an integer number (71146024326).

Almost surely, 2^521700670051 is an apocalyptic number.

521700670051 is a deficient number, since it is larger than the sum of its proper divisors (47467524557).

521700670051 is a wasteful number, since it uses less digits than its factorization.

521700670051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349253.

The product of its (nonzero) digits is 14700, while the sum is 34.

Adding to 521700670051 its reverse (150076007125), we get a palindrome (671776677176).

The spelling of 521700670051 in words is "five hundred twenty-one billion, seven hundred million, six hundred seventy thousand, fifty-one".