231402233 has 2 divisors, whose sum is σ = 231402234. Its totient is φ = 231402232.

The previous prime is 231402217. The next prime is 231402253. The reversal of 231402233 is 332204132.

It is an a-pointer prime, because the next prime (231402253) can be obtained adding 231402233 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135303424 + 96098809 = 11632^2 + 9803^2 .

It is a cyclic number.

It is not a de Polignac number, because 231402233 - 2⁴ = 231402217 is a prime.

It is not a weakly prime, because it can be changed into another prime (231402253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115701116 + 115701117.

It is an arithmetic number, because the mean of its divisors is an integer number (115701117).

Almost surely, 2^231402233 is an apocalyptic number.

It is an amenable number.

231402233 is a deficient number, since it is larger than the sum of its proper divisors (1).

231402233 is an equidigital number, since it uses as much as digits as its factorization.

231402233 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 231402233 is about 15211.9108924553. The cubic root of 231402233 is about 613.9351728393.

Adding to 231402233 its reverse (332204132), we get a palindrome (563606365).

The spelling of 231402233 in words is "two hundred thirty-one million, four hundred two thousand, two hundred thirty-three".