131022223 has 4 divisors (see below), whose sum is σ = 132600888. Its totient is φ = 129443560.

The previous prime is 131022187. The next prime is 131022259. The reversal of 131022223 is 322220131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 322220131 = 29 ⋅11111039.

It is an interprime number because it is at equal distance from previous prime (131022187) and next prime (131022259).

It is a cyclic number.

It is not a de Polignac number, because 131022223 - 2⁹ = 131021711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131022197 and 131022206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131022293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 789208 + ... + 789373.

It is an arithmetic number, because the mean of its divisors is an integer number (33150222).

Almost surely, 2^131022223 is an apocalyptic number.

131022223 is a deficient number, since it is larger than the sum of its proper divisors (1578665).

131022223 is an equidigital number, since it uses as much as digits as its factorization.

131022223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578664.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 131022223 is about 11446.4939173530. The cubic root of 131022223 is about 507.9040250520.

Adding to 131022223 its reverse (322220131), we get a palindrome (453242354).

The spelling of 131022223 in words is "one hundred thirty-one million, twenty-two thousand, two hundred twenty-three".