131222056 has 48 divisors (see below), whose sum is σ = 296814240. Its totient is φ = 53269920.

The previous prime is 131222033. The next prime is 131222059. The reversal of 131222056 is 650222131.

It is not an unprimeable number, because it can be changed into a prime (131222059) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16971 + ... + 23461.

It is an arithmetic number, because the mean of its divisors is an integer number (6183630).

Almost surely, 2^131222056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 131222056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148407120).

131222056 is an abundant number, since it is smaller than the sum of its proper divisors (165592184).

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

131222056 is a wasteful number, since it uses less digits than its factorization.

131222056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6542 (or 6519 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 131222056 is about 11455.2195963238. The cubic root of 131222056 is about 508.1621095875.

Adding to 131222056 its reverse (650222131), we get a palindrome (781444187).

The spelling of 131222056 in words is "one hundred thirty-one million, two hundred twenty-two thousand, fifty-six".