231848021 has 4 divisors (see below), whose sum is σ = 232171200. Its totient is φ = 231524844.

The previous prime is 231848009. The next prime is 231848047. The reversal of 231848021 is 120848132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231848021 - 2¹⁸ = 231585877 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 (231848521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 160511 + ... + 161948.

It is an arithmetic number, because the mean of its divisors is an integer number (58042800).

Almost surely, 2^231848021 is an apocalyptic number.

It is an amenable number.

231848021 is a deficient number, since it is larger than the sum of its proper divisors (323179).

231848021 is an equidigital number, since it uses as much as digits as its factorization.

231848021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323178.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 231848021 is about 15226.5564393267. The cubic root of 231848021 is about 614.3291612192.

The spelling of 231848021 in words is "two hundred thirty-one million, eight hundred forty-eight thousand, twenty-one".