131332421 has 8 divisors (see below), whose sum is σ = 144691488. Its totient is φ = 118210000.

The previous prime is 131332393. The next prime is 131332423. The reversal of 131332421 is 124233131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131332421 - 2¹⁰ = 131331397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 131332393 and 131332402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131332423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57995 + ... + 60216.

It is an arithmetic number, because the mean of its divisors is an integer number (18086436).

Almost surely, 2^131332421 is an apocalyptic number.

131332421 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131332421 is a deficient number, since it is larger than the sum of its proper divisors (13359067).

131332421 is a wasteful number, since it uses less digits than its factorization.

131332421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118323.

The product of its digits is 432, while the sum is 20.

The square root of 131332421 is about 11460.0358201883. The cubic root of 131332421 is about 508.3045338039.

Adding to 131332421 its reverse (124233131), we get a palindrome (255565552).

The spelling of 131332421 in words is "one hundred thirty-one million, three hundred thirty-two thousand, four hundred twenty-one".