231432087 has 4 divisors (see below), whose sum is σ = 308576120. Its totient is φ = 154288056.

The previous prime is 231432073. The next prime is 231432121. The reversal of 231432087 is 780234132.

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

It is not a de Polignac number, because 231432087 - 2⁸ = 231431831 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 (231432007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38572012 + ... + 38572017.

It is an arithmetic number, because the mean of its divisors is an integer number (77144030).

Almost surely, 2^231432087 is an apocalyptic number.

231432087 is a deficient number, since it is larger than the sum of its proper divisors (77144033).

231432087 is an equidigital number, since it uses as much as digits as its factorization.

231432087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77144032.

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 231432087 is about 15212.8921313470. The cubic root of 231432087 is about 613.9615736685.

The spelling of 231432087 in words is "two hundred thirty-one million, four hundred thirty-two thousand, eighty-seven".