232239991 has 4 divisors (see below), whose sum is σ = 232549984. Its totient is φ = 231930000.

The previous prime is 232239977. The next prime is 232240007. The reversal of 232239991 is 199932232.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 232239991 - 2⁷ = 232239863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (232239391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153870 + ... + 155371.

It is an arithmetic number, because the mean of its divisors is an integer number (58137496).

Almost surely, 2^232239991 is an apocalyptic number.

232239991 is a deficient number, since it is larger than the sum of its proper divisors (309993).

232239991 is an equidigital number, since it uses as much as digits as its factorization.

232239991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309992.

The product of its digits is 52488, while the sum is 40.

The square root of 232239991 is about 15239.4222659522. The cubic root of 232239991 is about 614.6751680946.

The spelling of 232239991 in words is "two hundred thirty-two million, two hundred thirty-nine thousand, nine hundred ninety-one".