131144451 has 4 divisors (see below), whose sum is σ = 174859272. Its totient is φ = 87429632.

The previous prime is 131144417. The next prime is 131144471. The reversal of 131144451 is 154441131.

It is a happy number.

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 131144451 - 2⁷ = 131144323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (131144401) 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, 21857406 + ... + 21857411.

It is an arithmetic number, because the mean of its divisors is an integer number (43714818).

Almost surely, 2^131144451 is an apocalyptic number.

131144451 is a deficient number, since it is larger than the sum of its proper divisors (43714821).

131144451 is an equidigital number, since it uses as much as digits as its factorization.

131144451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43714820.

The product of its digits is 960, while the sum is 24.

The square root of 131144451 is about 11451.8317748734. The cubic root of 131144451 is about 508.0619137860.

Adding to 131144451 its reverse (154441131), we get a palindrome (285585582).

The spelling of 131144451 in words is "one hundred thirty-one million, one hundred forty-four thousand, four hundred fifty-one".