231442303 has 2 divisors, whose sum is σ = 231442304. Its totient is φ = 231442302.

The previous prime is 231442279. The next prime is 231442333. The reversal of 231442303 is 303244132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231442303 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231442333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115721151 + 115721152.

It is an arithmetic number, because the mean of its divisors is an integer number (115721152).

Almost surely, 2^231442303 is an apocalyptic number.

231442303 is a deficient number, since it is larger than the sum of its proper divisors (1).

231442303 is an equidigital number, since it uses as much as digits as its factorization.

231442303 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 231442303 is about 15213.2278954862. The cubic root of 231442303 is about 613.9706074765.

Adding to 231442303 its reverse (303244132), we get a palindrome (534686435).

The spelling of 231442303 in words is "two hundred thirty-one million, four hundred forty-two thousand, three hundred three".