232155989 has 4 divisors (see below), whose sum is σ = 250014156. Its totient is φ = 214297824.

The previous prime is 232155949. The next prime is 232156021. The reversal of 232155989 is 989551232.

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

It can be written as a sum of positive squares in 2 ways, for example, as 130347889 + 101808100 = 11417^2 + 10090^2 .

It is not a de Polignac number, because 232155989 - 2⁸ = 232155733 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 (232155919) 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 in 3 ways as a sum of consecutive naturals, for example, 8929064 + ... + 8929089.

It is an arithmetic number, because the mean of its divisors is an integer number (62503539).

Almost surely, 2^232155989 is an apocalyptic number.

It is an amenable number.

232155989 is a deficient number, since it is larger than the sum of its proper divisors (17858167).

232155989 is a wasteful number, since it uses less digits than its factorization.

232155989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17858166.

The product of its digits is 194400, while the sum is 44.

The square root of 232155989 is about 15236.6659410778. The cubic root of 232155989 is about 614.6010491198.

The spelling of 232155989 in words is "two hundred thirty-two million, one hundred fifty-five thousand, nine hundred eighty-nine".