520513343551 has 8 divisors (see below), whose sum is σ = 543930401664. Its totient is φ = 497161789080.

The previous prime is 520513343503. The next prime is 520513343573. The reversal of 520513343551 is 155343315025.

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

It is not a de Polignac number, because 520513343551 - 2³⁵ = 486153605183 is a prime.

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 520513343551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520513347551) 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, 16359661 + ... + 16391446.

It is an arithmetic number, because the mean of its divisors is an integer number (67991300208).

Almost surely, 2^520513343551 is an apocalyptic number.

520513343551 is a deficient number, since it is larger than the sum of its proper divisors (23417058113).

520513343551 is a wasteful number, since it uses less digits than its factorization.

520513343551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32751821.

The product of its (nonzero) digits is 135000, while the sum is 37.

Adding to 520513343551 its reverse (155343315025), we get a palindrome (675856658576).

The spelling of 520513343551 in words is "five hundred twenty billion, five hundred thirteen million, three hundred forty-three thousand, five hundred fifty-one".