513430221 has 8 divisors (see below), whose sum is σ = 690854560. Its totient is φ = 339146352.

The previous prime is 513430207. The next prime is 513430237. The reversal of 513430221 is 122034315.

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

It is not a de Polignac number, because 513430221 - 2⁶ = 513430157 is a prime.

It is a super-2 number, since 2×513430221² = 527221183672217682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513430201) 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, 784735 + ... + 785388.

It is an arithmetic number, because the mean of its divisors is an integer number (86356820).

Almost surely, 2^513430221 is an apocalyptic number.

It is an amenable number.

513430221 is a deficient number, since it is larger than the sum of its proper divisors (177424339).

513430221 is a wasteful number, since it uses less digits than its factorization.

513430221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1570235.

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 513430221 is about 22658.9986760227. The cubic root of 513430221 is about 800.7442142376.

Adding to 513430221 its reverse (122034315), we get a palindrome (635464536).

The spelling of 513430221 in words is "five hundred thirteen million, four hundred thirty thousand, two hundred twenty-one".