131312621 has 8 divisors (see below), whose sum is σ = 147871488. Its totient is φ = 115524000.

The previous prime is 131312617. The next prime is 131312639. The reversal of 131312621 is 126213131.

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 131312621 - 2² = 131312617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 131312593 and 131312602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131312651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192200 + ... + 192881.

It is an arithmetic number, because the mean of its divisors is an integer number (18483936).

Almost surely, 2^131312621 is an apocalyptic number.

131312621 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

131312621 is a deficient number, since it is larger than the sum of its proper divisors (16558867).

131312621 is a wasteful number, since it uses less digits than its factorization.

131312621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 385123.

The product of its digits is 216, while the sum is 20.

The square root of 131312621 is about 11459.1719159807. The cubic root of 131312621 is about 508.2789881047.

Adding to 131312621 its reverse (126213131), we get a palindrome (257525752).

The spelling of 131312621 in words is "one hundred thirty-one million, three hundred twelve thousand, six hundred twenty-one".