513020163633431 has 4 divisors (see below), whose sum is σ = 513089016165864. Its totient is φ = 512951311101000.

The previous prime is 513020163633371. The next prime is 513020163633433. The reversal of 513020163633431 is 134336361020315.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513020163633431 is a prime.

It is a super-4 number, since 4×513020163633431⁴ (a number of 60 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513020163633433) 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, 34426255040 + ... + 34426269941.

It is an arithmetic number, because the mean of its divisors is an integer number (128272254041466).

Almost surely, 2^{513020163633431} is an apocalyptic number.

513020163633431 is a deficient number, since it is larger than the sum of its proper divisors (68852532433).

513020163633431 is an equidigital number, since it uses as much as digits as its factorization.

513020163633431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68852532432.

The product of its (nonzero) digits is 349920, while the sum is 41.

The spelling of 513020163633431 in words is "five hundred thirteen trillion, twenty billion, one hundred sixty-three million, six hundred thirty-three thousand, four hundred thirty-one".