2331223131 has 4 divisors (see below), whose sum is σ = 3108297512. Its totient is φ = 1554148752.

The previous prime is 2331223127. The next prime is 2331223151. The reversal of 2331223131 is 1313221332.

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

It is not a de Polignac number, because 2331223131 - 2² = 2331223127 is a prime.

It is a super-2 number, since 2×2331223131² = 10869202573018886322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2331223098 and 2331223107.

It is not an unprimeable number, because it can be changed into a prime (2331223151) 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, 388537186 + ... + 388537191.

It is an arithmetic number, because the mean of its divisors is an integer number (777074378).

Almost surely, 2^2331223131 is an apocalyptic number.

2331223131 is a deficient number, since it is larger than the sum of its proper divisors (777074381).

2331223131 is an equidigital number, since it uses as much as digits as its factorization.

2331223131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777074380.

The product of its digits is 648, while the sum is 21.

The square root of 2331223131 is about 48282.7415439513. The cubic root of 2331223131 is about 1325.9524431893.

Adding to 2331223131 its reverse (1313221332), we get a palindrome (3644444463).

The spelling of 2331223131 in words is "two billion, three hundred thirty-one million, two hundred twenty-three thousand, one hundred thirty-one".