131244421 has 16 divisors (see below), whose sum is σ = 168910848. Its totient is φ = 98967600.

The previous prime is 131244413. The next prime is 131244427. The reversal of 131244421 is 124442131.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 131244421 - 2³ = 131244413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131244392 and 131244401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131244427) 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 15 ways as a sum of consecutive naturals, for example, 25105 + ... + 29878.

It is an arithmetic number, because the mean of its divisors is an integer number (10556928).

Almost surely, 2^131244421 is an apocalyptic number.

131244421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131244421 is a deficient number, since it is larger than the sum of its proper divisors (37666427).

131244421 is a wasteful number, since it uses less digits than its factorization.

131244421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55032.

The product of its digits is 768, while the sum is 22.

The square root of 131244421 is about 11456.1957472802. The cubic root of 131244421 is about 508.1909777019.

Adding to 131244421 its reverse (124442131), we get a palindrome (255686552).

The spelling of 131244421 in words is "one hundred thirty-one million, two hundred forty-four thousand, four hundred twenty-one".