131123222 has 4 divisors (see below), whose sum is σ = 196684836. Its totient is φ = 65561610.

The previous prime is 131123203. The next prime is 131123249. The reversal of 131123222 is 222321131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 222321131 = 971 ⋅228961.

It is a super-2 number, since 2×131123222² = 34386598695322568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 131123222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32780804 + ... + 32780807.

It is an arithmetic number, because the mean of its divisors is an integer number (49171209).

Almost surely, 2^131123222 is an apocalyptic number.

131123222 is a deficient number, since it is larger than the sum of its proper divisors (65561614).

131123222 is an equidigital number, since it uses as much as digits as its factorization.

131123222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65561613.

The product of its digits is 144, while the sum is 17.

The square root of 131123222 is about 11450.9048550759. The cubic root of 131123222 is about 508.0344981429.

Adding to 131123222 its reverse (222321131), we get a palindrome (353444353).

The spelling of 131123222 in words is "one hundred thirty-one million, one hundred twenty-three thousand, two hundred twenty-two".