6581156131 has 4 divisors (see below), whose sum is σ = 7179443064. Its totient is φ = 5982869200.

The previous prime is 6581156107. The next prime is 6581156159. The reversal of 6581156131 is 1316511856.

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

It is not a de Polignac number, because 6581156131 - 2⁹ = 6581155619 is a prime.

It is a super-2 number, since 2×6581156131² = 86623232041197778322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6581156431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299143450 + ... + 299143471.

It is an arithmetic number, because the mean of its divisors is an integer number (1794860766).

Almost surely, 2^6581156131 is an apocalyptic number.

6581156131 is a deficient number, since it is larger than the sum of its proper divisors (598286933).

6581156131 is a wasteful number, since it uses less digits than its factorization.

6581156131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598286932.

The product of its digits is 21600, while the sum is 37.

The square root of 6581156131 is about 81124.3251497355. The cubic root of 6581156131 is about 1873.9905564717.

Adding to 6581156131 its reverse (1316511856), we get a palindrome (7897667987).

The spelling of 6581156131 in words is "six billion, five hundred eighty-one million, one hundred fifty-six thousand, one hundred thirty-one".