2131151131 has 4 divisors (see below), whose sum is σ = 2243317000. Its totient is φ = 2018985264.

The previous prime is 2131151129. The next prime is 2131151149. The reversal of 2131151131 is 1311511312.

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

It is a cyclic number.

It is not a de Polignac number, because 2131151131 - 2¹ = 2131151129 is a prime.

It is a super-2 number, since 2×2131151131² = 9083610286325158322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 112165849 = 2131151131 / (2 + 1 + 3 + 1 + 1 + 5 + 1 + 1 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2131151099 and 2131151108.

It is not an unprimeable number, because it can be changed into a prime (2131151171) 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 in 3 ways as a sum of consecutive naturals, for example, 56082906 + ... + 56082943.

It is an arithmetic number, because the mean of its divisors is an integer number (560829250).

Almost surely, 2^2131151131 is an apocalyptic number.

2131151131 is a deficient number, since it is larger than the sum of its proper divisors (112165869).

2131151131 is a wasteful number, since it uses less digits than its factorization.

2131151131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112165868.

The product of its digits is 90, while the sum is 19.

The square root of 2131151131 is about 46164.3924578240. The cubic root of 2131151131 is about 1286.8800936446.

Adding to 2131151131 its reverse (1311511312), we get a palindrome (3442662443).

The spelling of 2131151131 in words is "two billion, one hundred thirty-one million, one hundred fifty-one thousand, one hundred thirty-one".