862131131 has 2 divisors, whose sum is σ = 862131132. Its totient is φ = 862131130.

The previous prime is 862131121. The next prime is 862131133. The reversal of 862131131 is 131131268.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 862131131 - 2¹⁰ = 862130107 is a prime.

It is a super-3 number, since 3×862131131³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 862131133, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 862131131.

It is not a weakly prime, because it can be changed into another prime (862131133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431065565 + 431065566.

It is an arithmetic number, because the mean of its divisors is an integer number (431065566).

Almost surely, 2^862131131 is an apocalyptic number.

862131131 is a deficient number, since it is larger than the sum of its proper divisors (1).

862131131 is an equidigital number, since it uses as much as digits as its factorization.

862131131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 862131131 is about 29362.0695966752. The cubic root of 862131131 is about 951.7534121569.

Adding to 862131131 its reverse (131131268), we get a palindrome (993262399).

The spelling of 862131131 in words is "eight hundred sixty-two million, one hundred thirty-one thousand, one hundred thirty-one".