131222241 has 8 divisors (see below), whose sum is σ = 194403360. Its totient is φ = 87481476.

The previous prime is 131222237. The next prime is 131222243. The reversal of 131222241 is 142222131.

It is a happy number.

It is not a de Polignac number, because 131222241 - 2² = 131222237 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131222243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2430015 + ... + 2430068.

It is an arithmetic number, because the mean of its divisors is an integer number (24300420).

Almost surely, 2^131222241 is an apocalyptic number.

It is an amenable number.

131222241 is a deficient number, since it is larger than the sum of its proper divisors (63181119).

131222241 is an equidigital number, since it uses as much as digits as its factorization.

131222241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4860092 (or 4860086 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 131222241 is about 11455.2276712425. The cubic root of 131222241 is about 508.1623483937.

Adding to 131222241 its reverse (142222131), we get a palindrome (273444372).

The spelling of 131222241 in words is "one hundred thirty-one million, two hundred twenty-two thousand, two hundred forty-one".