233331222161 has 2 divisors, whose sum is σ = 233331222162. Its totient is φ = 233331222160.

The previous prime is 233331222109. The next prime is 233331222263. The reversal of 233331222161 is 161222133332.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 212686992400 + 20644229761 = 461180^2 + 143681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233331222161 is a prime.

It is not a weakly prime, because it can be changed into another prime (233331222661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116665611080 + 116665611081.

It is an arithmetic number, because the mean of its divisors is an integer number (116665611081).

Almost surely, 2^233331222161 is an apocalyptic number.

It is an amenable number.

233331222161 is a deficient number, since it is larger than the sum of its proper divisors (1).

233331222161 is an equidigital number, since it uses as much as digits as its factorization.

233331222161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 29.

Adding to 233331222161 its reverse (161222133332), we get a palindrome (394553355493).

The spelling of 233331222161 in words is "two hundred thirty-three billion, three hundred thirty-one million, two hundred twenty-two thousand, one hundred sixty-one".