513221011 has 8 divisors (see below), whose sum is σ = 538343424. Its totient is φ = 488332680.

The previous prime is 513220993. The next prime is 513221017. The reversal of 513221011 is 110122315.

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 513221011 - 2⁵ = 513220979 is a prime.

It is a super-2 number, since 2×513221011² = 526791612263724242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513221017) 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, 54021 + ... + 62806.

It is an arithmetic number, because the mean of its divisors is an integer number (67292928).

Almost surely, 2^513221011 is an apocalyptic number.

513221011 is a deficient number, since it is larger than the sum of its proper divisors (25122413).

513221011 is a wasteful number, since it uses less digits than its factorization.

513221011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117041.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 513221011 is about 22654.3817174515. The cubic root of 513221011 is about 800.6354383681.

Adding to 513221011 its reverse (110122315), we get a palindrome (623343326).

The spelling of 513221011 in words is "five hundred thirteen million, two hundred twenty-one thousand, eleven".