231401333 has 2 divisors, whose sum is σ = 231401334. Its totient is φ = 231401332.

The previous prime is 231401279. The next prime is 231401341. The reversal of 231401333 is 333104132.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 230493124 + 908209 = 15182^2 + 953^2 .

It is a cyclic number.

It is not a de Polignac number, because 231401333 - 2²⁴ = 214624117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231401383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115700666 + 115700667.

It is an arithmetic number, because the mean of its divisors is an integer number (115700667).

Almost surely, 2^231401333 is an apocalyptic number.

It is an amenable number.

231401333 is a deficient number, since it is larger than the sum of its proper divisors (1).

231401333 is an equidigital number, since it uses as much as digits as its factorization.

231401333 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 231401333 is about 15211.8813103442. The cubic root of 231401333 is about 613.9343769058.

Adding to 231401333 its reverse (333104132), we get a palindrome (564505465).

The spelling of 231401333 in words is "two hundred thirty-one million, four hundred one thousand, three hundred thirty-three".