131811427 has 12 divisors (see below), whose sum is σ = 147802536. Its totient is φ = 116576640.

The previous prime is 131811401. The next prime is 131811443. The reversal of 131811427 is 724118131.

It is not a de Polignac number, because 131811427 - 2⁷ = 131811299 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131811395 and 131811404.

It is not an unprimeable number, because it can be changed into a prime (131811497) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10683 + ... + 19435.

It is an arithmetic number, because the mean of its divisors is an integer number (12316878).

Almost surely, 2^131811427 is an apocalyptic number.

131811427 is a deficient number, since it is larger than the sum of its proper divisors (15991109).

131811427 is an equidigital number, since it uses as much as digits as its factorization.

131811427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8838 (or 8801 counting only the distinct ones).

The product of its digits is 1344, while the sum is 28.

The square root of 131811427 is about 11480.9157735783. The cubic root of 131811427 is about 508.9217601870.

Adding to 131811427 its reverse (724118131), we get a palindrome (855929558).

The spelling of 131811427 in words is "one hundred thirty-one million, eight hundred eleven thousand, four hundred twenty-seven".