232240991 has 2 divisors, whose sum is σ = 232240992. Its totient is φ = 232240990.

The previous prime is 232240951. The next prime is 232240993. The reversal of 232240991 is 199042232.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-232240991 is a prime.

Together with 232240993, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_12759044 and since 232240991 and 12759044 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (232240993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 116120495 + 116120496.

It is an arithmetic number, because the mean of its divisors is an integer number (116120496).

Almost surely, 2^232240991 is an apocalyptic number.

232240991 is a deficient number, since it is larger than the sum of its proper divisors (1).

232240991 is an equidigital number, since it uses as much as digits as its factorization.

232240991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 232240991 is about 15239.4550755596. The cubic root of 232240991 is about 614.6760503346.

The spelling of 232240991 in words is "two hundred thirty-two million, two hundred forty thousand, nine hundred ninety-one".