131444331 has 4 divisors (see below), whose sum is σ = 175259112. Its totient is φ = 87629552.

The previous prime is 131444321. The next prime is 131444347. The reversal of 131444331 is 133444131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 131444331 - 2¹⁰ = 131443307 is a prime.

It is a super-2 number, since 2×131444331² = 34555224304075122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (131444321) 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, 21907386 + ... + 21907391.

It is an arithmetic number, because the mean of its divisors is an integer number (43814778).

Almost surely, 2^131444331 is an apocalyptic number.

131444331 is a deficient number, since it is larger than the sum of its proper divisors (43814781).

131444331 is an equidigital number, since it uses as much as digits as its factorization.

131444331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43814780.

The product of its digits is 1728, while the sum is 24.

The square root of 131444331 is about 11464.9174004875. The cubic root of 131444331 is about 508.4488703668.

Adding to 131444331 its reverse (133444131), we get a palindrome (264888462).

The spelling of 131444331 in words is "one hundred thirty-one million, four hundred forty-four thousand, three hundred thirty-one".