2131131 has 4 divisors (see below), whose sum is σ = 2841512. Its totient is φ = 1420752.

The previous prime is 2131127. The next prime is 2131133. The reversal of 2131131 is 1311312.

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

It is not a de Polignac number, because 2131131 - 2² = 2131127 is a prime.

It is a super-2 number, since 2×2131131² = 9083438678322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355186 + ... + 355191.

It is an arithmetic number, because the mean of its divisors is an integer number (710378).

2^2131131 is an apocalyptic number.

2131131 is a deficient number, since it is larger than the sum of its proper divisors (710381).

2131131 is an equidigital number, since it uses as much as digits as its factorization.

2131131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710380.

The product of its digits is 18, while the sum is 12.

The square root of 2131131 is about 1459.8393747259. The cubic root of 2131131 is about 128.6876041646.

Adding to 2131131 its reverse (1311312), we get a palindrome (3442443).

It can be divided in two parts, 2 and 131131, that multiplied together give a palindrome (262262).

The spelling of 2131131 in words is "two million, one hundred thirty-one thousand, one hundred thirty-one".