131136223 has 4 divisors (see below), whose sum is σ = 131463648. Its totient is φ = 130808800.

The previous prime is 131136211. The next prime is 131136259. The reversal of 131136223 is 322631131.

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 131136223 - 2⁵ = 131136191 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131136194 and 131136203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131136023) 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, 163111 + ... + 163912.

It is an arithmetic number, because the mean of its divisors is an integer number (32865912).

Almost surely, 2^131136223 is an apocalyptic number.

131136223 is a deficient number, since it is larger than the sum of its proper divisors (327425).

131136223 is an equidigital number, since it uses as much as digits as its factorization.

131136223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327424.

The product of its digits is 648, while the sum is 22.

The square root of 131136223 is about 11451.4725254004. The cubic root of 131136223 is about 508.0512882993.

Adding to 131136223 its reverse (322631131), we get a palindrome (453767354).

The spelling of 131136223 in words is "one hundred thirty-one million, one hundred thirty-six thousand, two hundred twenty-three".