131220322 has 8 divisors (see below), whose sum is σ = 196939116. Its totient is φ = 65573952.

The previous prime is 131220293. The next prime is 131220329. The reversal of 131220322 is 223022131.

It can be written as a sum of positive squares in 2 ways, for example, as 102394161 + 28826161 = 10119^2 + 5369^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 131220296 and 131220305.

It is not an unprimeable number, because it can be changed into a prime (131220329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13323 + ... + 20974.

Almost surely, 2^131220322 is an apocalyptic number.

131220322 is a deficient number, since it is larger than the sum of its proper divisors (65718794).

131220322 is a wasteful number, since it uses less digits than its factorization.

131220322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36212.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 131220322 is about 11455.1439100519. The cubic root of 131220322 is about 508.1598712519.

Adding to 131220322 its reverse (223022131), we get a palindrome (354242453).

The spelling of 131220322 in words is "one hundred thirty-one million, two hundred twenty thousand, three hundred twenty-two".