513521401 has 4 divisors (see below), whose sum is σ = 513581904. Its totient is φ = 513460900.

The previous prime is 513521387. The next prime is 513521413. The reversal of 513521401 is 104125315.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 513521401 - 2⁵ = 513521369 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513527401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14935 + ... + 35356.

It is an arithmetic number, because the mean of its divisors is an integer number (128395476).

Almost surely, 2^513521401 is an apocalyptic number.

It is an amenable number.

513521401 is a deficient number, since it is larger than the sum of its proper divisors (60503).

513521401 is a wasteful number, since it uses less digits than its factorization.

513521401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60502.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 513521401 is about 22661.0105908805. The cubic root of 513521401 is about 800.7916127823.

Adding to 513521401 its reverse (104125315), we get a palindrome (617646716).

The spelling of 513521401 in words is "five hundred thirteen million, five hundred twenty-one thousand, four hundred one".