513556056031 has 2 divisors, whose sum is σ = 513556056032. Its totient is φ = 513556056030.

The previous prime is 513556056029. The next prime is 513556056103. The reversal of 513556056031 is 130650655315.

It is a happy number.

Together with next prime (513556056103) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 513556056031 - 2¹ = 513556056029 is a prime.

It is a super-3 number, since 3×513556056031³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 513556056029, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513556036031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256778028015 + 256778028016.

It is an arithmetic number, because the mean of its divisors is an integer number (256778028016).

Almost surely, 2^513556056031 is an apocalyptic number.

513556056031 is a deficient number, since it is larger than the sum of its proper divisors (1).

513556056031 is an equidigital number, since it uses as much as digits as its factorization.

513556056031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 202500, while the sum is 40.

The spelling of 513556056031 in words is "five hundred thirteen billion, five hundred fifty-six million, fifty-six thousand, thirty-one".