231433 has 2 divisors, whose sum is σ = 231434. Its totient is φ = 231432.

The previous prime is 231431. The next prime is 231443. The reversal of 231433 is 334132.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222784 + 8649 = 472^2 + 93^2 .

It is a cyclic number.

It is not a de Polignac number, because 231433 - 2¹ = 231431 is a prime.

It is a super-2 number, since 2×231433² = 107122466978, which contains 22 as substring.

Together with 231431, it forms a pair of twin primes.

It is equal to p₂₀₅₅₄ and since 231433 and 20554 have the same sum of digits, it is a Honaker prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (231431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115716 + 115717.

It is an arithmetic number, because the mean of its divisors is an integer number (115717).

2²³¹⁴³³ is an apocalyptic number.

It is an amenable number.

231433 is a deficient number, since it is larger than the sum of its proper divisors (1).

231433 is an equidigital number, since it uses as much as digits as its factorization.

231433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 16.

The square root of 231433 is about 481.0748382528. The cubic root of 231433 is about 61.3962381027.

Adding to 231433 its reverse (334132), we get a palindrome (565565).

The spelling of 231433 in words is "two hundred thirty-one thousand, four hundred thirty-three".