233201401991 has 2 divisors, whose sum is σ = 233201401992. Its totient is φ = 233201401990.

The previous prime is 233201401843. The next prime is 233201402011. The reversal of 233201401991 is 199104102332.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-233201401991 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (233201403991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116600700995 + 116600700996.

It is an arithmetic number, because the mean of its divisors is an integer number (116600700996).

Almost surely, 2^233201401991 is an apocalyptic number.

233201401991 is a deficient number, since it is larger than the sum of its proper divisors (1).

233201401991 is an equidigital number, since it uses as much as digits as its factorization.

233201401991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 35.

The spelling of 233201401991 in words is "two hundred thirty-three billion, two hundred one million, four hundred one thousand, nine hundred ninety-one".