513304221 has 8 divisors (see below), whose sum is σ = 684518944. Its totient is φ = 342146160.

The previous prime is 513304139. The next prime is 513304229. The reversal of 513304221 is 122403315.

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

It is not a de Polignac number, because 513304221 - 2¹¹ = 513302173 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 (513304229) 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, 16395 + ... + 35991.

It is an arithmetic number, because the mean of its divisors is an integer number (85564868).

Almost surely, 2^513304221 is an apocalyptic number.

It is an amenable number.

513304221 is a deficient number, since it is larger than the sum of its proper divisors (171214723).

513304221 is a wasteful number, since it uses less digits than its factorization.

513304221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28331.

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

The square root of 513304221 is about 22656.2181530811. The cubic root of 513304221 is about 800.6787058060.

Adding to 513304221 its reverse (122403315), we get a palindrome (635707536).

The spelling of 513304221 in words is "five hundred thirteen million, three hundred four thousand, two hundred twenty-one".