231214787 has 4 divisors (see below), whose sum is σ = 231251256. Its totient is φ = 231178320.

The previous prime is 231214783. The next prime is 231214793. The reversal of 231214787 is 787412132.

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 231214787 - 2² = 231214783 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231214783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5978 + ... + 22319.

It is an arithmetic number, because the mean of its divisors is an integer number (57812814).

Almost surely, 2^231214787 is an apocalyptic number.

231214787 is a deficient number, since it is larger than the sum of its proper divisors (36469).

231214787 is an equidigital number, since it uses as much as digits as its factorization.

231214787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36468.

The product of its digits is 18816, while the sum is 35.

The square root of 231214787 is about 15205.7484853591. The cubic root of 231214787 is about 613.7693565489.

The spelling of 231214787 in words is "two hundred thirty-one million, two hundred fourteen thousand, seven hundred eighty-seven".