131323212 has 72 divisors (see below), whose sum is σ = 358940400. Its totient is φ = 40341888.

The previous prime is 131323189. The next prime is 131323253. The reversal of 131323212 is 212323131.

131323212 is a `hidden beast` number, since 131 + 323 + 212 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22714 + ... + 27902.

Almost surely, 2^131323212 is an apocalyptic number.

131323212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131323212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179470200).

131323212 is an abundant number, since it is smaller than the sum of its proper divisors (227617188).

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

131323212 is a wasteful number, since it uses less digits than its factorization.

131323212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255 (or 5250 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 131323212 is about 11459.6340255699. The cubic root of 131323212 is about 508.2926527928.

Adding to 131323212 its reverse (212323131), we get a palindrome (343646343).

The spelling of 131323212 in words is "one hundred thirty-one million, three hundred twenty-three thousand, two hundred twelve".