513225442643 has 12 divisors (see below), whose sum is σ = 537241048800. Its totient is φ = 490054317120.

The previous prime is 513225442621. The next prime is 513225442649. The reversal of 513225442643 is 346244522315.

It is not a de Polignac number, because 513225442643 - 2⁶ = 513225442579 is a prime.

It is a super-2 number, since 2×513225442643² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 513225442643.

It is not an unprimeable number, because it can be changed into a prime (513225442649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3168968 + ... + 3326981.

It is an arithmetic number, because the mean of its divisors is an integer number (44770087400).

Almost surely, 2^513225442643 is an apocalyptic number.

513225442643 is a deficient number, since it is larger than the sum of its proper divisors (24015606157).

513225442643 is an equidigital number, since it uses as much as digits as its factorization.

513225442643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6496078 (or 6496037 counting only the distinct ones).

The product of its digits is 691200, while the sum is 41.

Adding to 513225442643 its reverse (346244522315), we get a palindrome (859469964958).

The spelling of 513225442643 in words is "five hundred thirteen billion, two hundred twenty-five million, four hundred forty-two thousand, six hundred forty-three".