131824621 has 8 divisors (see below), whose sum is σ = 135221400. Its totient is φ = 128461632.

The previous prime is 131824619. The next prime is 131824639. The reversal of 131824621 is 126428131.

It can be written as a sum of positive squares in 4 ways, for example, as 148996 + 131675625 = 386^2 + 11475^2 .

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 131824621 - 2¹ = 131824619 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131824621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131824601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450 + ... + 16243.

It is an arithmetic number, because the mean of its divisors is an integer number (16902675).

Almost surely, 2^131824621 is an apocalyptic number.

It is an amenable number.

131824621 is a deficient number, since it is larger than the sum of its proper divisors (3396779).

131824621 is a wasteful number, since it uses less digits than its factorization.

131824621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16895.

The product of its digits is 2304, while the sum is 28.

The square root of 131824621 is about 11481.4903649309. The cubic root of 131824621 is about 508.9387402264.

The spelling of 131824621 in words is "one hundred thirty-one million, eight hundred twenty-four thousand, six hundred twenty-one".