131800921 has 8 divisors (see below), whose sum is σ = 152751744. Its totient is φ = 111380640.

The previous prime is 131800883. The next prime is 131800927. The reversal of 131800921 is 129008131.

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

It is not a de Polignac number, because 131800921 - 2¹¹ = 131798873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131800927) 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, 132100 + ... + 133093.

It is an arithmetic number, because the mean of its divisors is an integer number (19093968).

Almost surely, 2^131800921 is an apocalyptic number.

It is an amenable number.

131800921 is a deficient number, since it is larger than the sum of its proper divisors (20950823).

131800921 is an equidigital number, since it uses as much as digits as its factorization.

131800921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265271.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 131800921 is about 11480.4582225624. The cubic root of 131800921 is about 508.9082386631.

The spelling of 131800921 in words is "one hundred thirty-one million, eight hundred thousand, nine hundred twenty-one".