131144321 has 16 divisors (see below), whose sum is σ = 170615808. Its totient is φ = 97746000.

The previous prime is 131144311. The next prime is 131144323. The reversal of 131144321 is 123441131.

It is not a de Polignac number, because 131144321 - 2²² = 126950017 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 131144293 and 131144302.

It is not an unprimeable number, because it can be changed into a prime (131144323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35255 + ... + 38796.

It is an arithmetic number, because the mean of its divisors is an integer number (10663488).

Almost surely, 2^131144321 is an apocalyptic number.

131144321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131144321 is a deficient number, since it is larger than the sum of its proper divisors (39471487).

131144321 is a wasteful number, since it uses less digits than its factorization.

131144321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74092.

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

The square root of 131144321 is about 11451.8260989241. The cubic root of 131144321 is about 508.0617459098.

Adding to 131144321 its reverse (123441131), we get a palindrome (254585452).

The spelling of 131144321 in words is "one hundred thirty-one million, one hundred forty-four thousand, three hundred twenty-one".