131323218 has 16 divisors (see below), whose sum is σ = 282850176. Its totient is φ = 40407120.

The previous prime is 131323189. The next prime is 131323253. The reversal of 131323218 is 812323131.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 841738 + ... + 841893.

It is an arithmetic number, because the mean of its divisors is an integer number (17678136).

Almost surely, 2^131323218 is an apocalyptic number.

131323218 is an abundant number, since it is smaller than the sum of its proper divisors (151526958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131323218 is a wasteful number, since it uses less digits than its factorization.

131323218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683649.

The product of its digits is 864, while the sum is 24.

The square root of 131323218 is about 11459.6342873584. The cubic root of 131323218 is about 508.2926605339.

Adding to 131323218 its reverse (812323131), we get a palindrome (943646349).

It can be divided in two parts, 1313 and 23218, that added together give a triangular number (24531 = T₂₂₁).

The spelling of 131323218 in words is "one hundred thirty-one million, three hundred twenty-three thousand, two hundred eighteen".