231422387 has 8 divisors (see below), whose sum is σ = 264585216. Its totient is φ = 198285192.

The previous prime is 231422381. The next prime is 231422393. The reversal of 231422387 is 783224132.

It is an interprime number because it is at equal distance from previous prime (231422381) and next prime (231422393).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231422387 - 2⁴ = 231422371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (231422381) 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 7 ways as a sum of consecutive naturals, for example, 20468 + ... + 29694.

It is an arithmetic number, because the mean of its divisors is an integer number (33073152).

Almost surely, 2^231422387 is an apocalyptic number.

231422387 is a deficient number, since it is larger than the sum of its proper divisors (33162829).

231422387 is an equidigital number, since it uses as much as digits as its factorization.

231422387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12817.

The product of its digits is 16128, while the sum is 32.

The square root of 231422387 is about 15212.5733194618. The cubic root of 231422387 is about 613.9529959031.

The spelling of 231422387 in words is "two hundred thirty-one million, four hundred twenty-two thousand, three hundred eighty-seven".