5131781323 has 18 divisors (see below), whose sum is σ = 5364833436. Its totient is φ = 4908502800.

The previous prime is 5131781309. The next prime is 5131781351. The reversal of 5131781323 is 3231871315.

It is not a de Polignac number, because 5131781323 - 2¹³ = 5131773131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5131781363) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28352293 + ... + 28352473.

It is an arithmetic number, because the mean of its divisors is an integer number (298046302).

Almost surely, 2^5131781323 is an apocalyptic number.

5131781323 is a deficient number, since it is larger than the sum of its proper divisors (233052113).

5131781323 is an equidigital number, since it uses as much as digits as its factorization.

5131781323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 375 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 5131781323 is about 71636.4524735836. The cubic root of 5131781323 is about 1724.8687232451.

The spelling of 5131781323 in words is "five billion, one hundred thirty-one million, seven hundred eighty-one thousand, three hundred twenty-three".