513166655221 has 8 divisors (see below), whose sum is σ = 569306613600. Its totient is φ = 458608104240.

The previous prime is 513166655191. The next prime is 513166655237. The reversal of 513166655221 is 122556661315.

It is a happy number.

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

It is not a de Polignac number, because 513166655221 - 2⁵ = 513166655189 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 (513166653221) 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, 395351166 + ... + 395352463.

It is an arithmetic number, because the mean of its divisors is an integer number (71163326700).

Almost surely, 2^513166655221 is an apocalyptic number.

It is an amenable number.

513166655221 is a deficient number, since it is larger than the sum of its proper divisors (56139958379).

513166655221 is a wasteful number, since it uses less digits than its factorization.

513166655221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790703699.

The product of its digits is 324000, while the sum is 43.

The spelling of 513166655221 in words is "five hundred thirteen billion, one hundred sixty-six million, six hundred fifty-five thousand, two hundred twenty-one".