5131167042781 has 4 divisors (see below), whose sum is σ = 5525872199932. Its totient is φ = 4736461885632.

The previous prime is 5131167042707. The next prime is 5131167042809. The reversal of 5131167042781 is 1872407611315.

5131167042781 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2099285129881 + 3031881912900 = 1448891^2 + 1741230^2 .

It is a cyclic number.

It is not a de Polignac number, because 5131167042781 - 2²³ = 5131158654173 is a prime.

It is a super-3 number, since 3×5131167042781³ (a number of 39 digits) contains 333 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 (5131167042481) 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, 197352578556 + ... + 197352578581.

It is an arithmetic number, because the mean of its divisors is an integer number (1381468049983).

Almost surely, 2^{5131167042781} is an apocalyptic number.

It is an amenable number.

5131167042781 is a deficient number, since it is larger than the sum of its proper divisors (394705157151).

5131167042781 is a wasteful number, since it uses less digits than its factorization.

5131167042781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394705157150.

The product of its (nonzero) digits is 282240, while the sum is 46.

The spelling of 5131167042781 in words is "five trillion, one hundred thirty-one billion, one hundred sixty-seven million, forty-two thousand, seven hundred eighty-one".