231808897 has 4 divisors (see below), whose sum is σ = 231839536. Its totient is φ = 231778260.

The previous prime is 231808891. The next prime is 231808901. The reversal of 231808897 is 798808132.

231808897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 231808897 - 2²³ = 223420289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231808891) 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, 5122 + ... + 22132.

It is an arithmetic number, because the mean of its divisors is an integer number (57959884).

Almost surely, 2^231808897 is an apocalyptic number.

It is an amenable number.

231808897 is a deficient number, since it is larger than the sum of its proper divisors (30639).

231808897 is a wasteful number, since it uses less digits than its factorization.

231808897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30638.

The product of its (nonzero) digits is 193536, while the sum is 46.

The square root of 231808897 is about 15225.2716560329. The cubic root of 231808897 is about 614.2946035722.

The spelling of 231808897 in words is "two hundred thirty-one million, eight hundred eight thousand, eight hundred ninety-seven".