513224031 has 4 divisors (see below), whose sum is σ = 684298712. Its totient is φ = 342149352.

The previous prime is 513224021. The next prime is 513224081. The reversal of 513224031 is 130422315.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 513224031 - 2⁷ = 513223903 is a prime.

It is a super-2 number, since 2×513224031² = 526797811991777922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 513223989 and 513224007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513224021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85537336 + ... + 85537341.

It is an arithmetic number, because the mean of its divisors is an integer number (171074678).

Almost surely, 2^513224031 is an apocalyptic number.

513224031 is a deficient number, since it is larger than the sum of its proper divisors (171074681).

513224031 is a wasteful number, since it uses less digits than its factorization.

513224031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171074680.

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

The square root of 513224031 is about 22654.4483711257. The cubic root of 513224031 is about 800.6370087860.

Adding to 513224031 its reverse (130422315), we get a palindrome (643646346).

The spelling of 513224031 in words is "five hundred thirteen million, two hundred twenty-four thousand, thirty-one".