131226223 has 4 divisors (see below), whose sum is σ = 132500368. Its totient is φ = 129952080.

The previous prime is 131226197. The next prime is 131226233. The reversal of 131226223 is 322622131.

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 131226223 - 2⁹ = 131225711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131226194 and 131226203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131226233) 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, 636918 + ... + 637123.

It is an arithmetic number, because the mean of its divisors is an integer number (33125092).

Almost surely, 2^131226223 is an apocalyptic number.

131226223 is a deficient number, since it is larger than the sum of its proper divisors (1274145).

131226223 is a wasteful number, since it uses less digits than its factorization.

131226223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274144.

The product of its digits is 864, while the sum is 22.

The square root of 131226223 is about 11455.4014770326. The cubic root of 131226223 is about 508.1674884828.

Adding to 131226223 its reverse (322622131), we get a palindrome (453848354).

The spelling of 131226223 in words is "one hundred thirty-one million, two hundred twenty-six thousand, two hundred twenty-three".