231894233 has 2 divisors, whose sum is σ = 231894234. Its totient is φ = 231894232.

The previous prime is 231894199. The next prime is 231894251. The reversal of 231894233 is 332498132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204718864 + 27175369 = 14308^2 + 5213^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231894233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231894193 and 231894202.

It is not a weakly prime, because it can be changed into another prime (231894833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115947116 + 115947117.

It is an arithmetic number, because the mean of its divisors is an integer number (115947117).

Almost surely, 2^231894233 is an apocalyptic number.

It is an amenable number.

231894233 is a deficient number, since it is larger than the sum of its proper divisors (1).

231894233 is an equidigital number, since it uses as much as digits as its factorization.

231894233 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 231894233 is about 15228.0738440553. The cubic root of 231894233 is about 614.3699745835.

The spelling of 231894233 in words is "two hundred thirty-one million, eight hundred ninety-four thousand, two hundred thirty-three".