131203621 has 8 divisors (see below), whose sum is σ = 136261664. Its totient is φ = 126236880.

The previous prime is 131203613. The next prime is 131203651. The reversal of 131203621 is 126302131.

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 131203621 - 2³ = 131203613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131203651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19890 + ... + 25651.

It is an arithmetic number, because the mean of its divisors is an integer number (17032708).

Almost surely, 2^131203621 is an apocalyptic number.

It is an amenable number.

131203621 is a deficient number, since it is larger than the sum of its proper divisors (5058043).

131203621 is an equidigital number, since it uses as much as digits as its factorization.

131203621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45651.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 131203621 is about 11454.4149130368. The cubic root of 131203621 is about 508.1383117405.

Adding to 131203621 its reverse (126302131), we get a palindrome (257505752).

The spelling of 131203621 in words is "one hundred thirty-one million, two hundred three thousand, six hundred twenty-one".