5163531381 has 20 divisors (see below), whose sum is σ = 7715577100. Its totient is φ = 3441393216.

The previous prime is 5163531353. The next prime is 5163531391. The reversal of 5163531381 is 1831353615.

5163531381 is a `hidden beast` number, since 5 + 1 + 635 + 3 + 13 + 8 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2541067281 + 2622464100 = 50409^2 + 51210^2 .

It is not a de Polignac number, because 5163531381 - 2¹⁰ = 5163530357 is a prime.

It is a super-2 number, since 2×5163531381² = 53324112645143534322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5163531341) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 396075 + ... + 408903.

It is an arithmetic number, because the mean of its divisors is an integer number (385778855).

Almost surely, 2^5163531381 is an apocalyptic number.

It is an amenable number.

5163531381 is a deficient number, since it is larger than the sum of its proper divisors (2552045719).

5163531381 is a wasteful number, since it uses less digits than its factorization.

5163531381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17810 (or 17801 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 5163531381 is about 71857.7162244946. The cubic root of 5163531381 is about 1728.4186359114.

Adding to 5163531381 its reverse (1831353615), we get a palindrome (6994884996).

The spelling of 5163531381 in words is "five billion, one hundred sixty-three million, five hundred thirty-one thousand, three hundred eighty-one".