131321441 has 4 divisors (see below), whose sum is σ = 134375472. Its totient is φ = 128267412.

The previous prime is 131321419. The next prime is 131321453. The reversal of 131321441 is 144123131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 144123131 = 5167 ⋅27893.

It is a cyclic number.

It is not a de Polignac number, because 131321441 - 2¹⁸ = 131059297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131321941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1526951 + ... + 1527036.

It is an arithmetic number, because the mean of its divisors is an integer number (33593868).

Almost surely, 2^131321441 is an apocalyptic number.

It is an amenable number.

131321441 is a deficient number, since it is larger than the sum of its proper divisors (3054031).

131321441 is an equidigital number, since it uses as much as digits as its factorization.

131321441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3054030.

The product of its digits is 288, while the sum is 20.

The square root of 131321441 is about 11459.5567540808. The cubic root of 131321441 is about 508.2903678697.

Adding to 131321441 its reverse (144123131), we get a palindrome (275444572).

The spelling of 131321441 in words is "one hundred thirty-one million, three hundred twenty-one thousand, four hundred forty-one".