231642065 has 8 divisors (see below), whose sum is σ = 283215528. Its totient is φ = 181816960.

The previous prime is 231642041. The next prime is 231642077. The reversal of 231642065 is 560246132.

It can be written as a sum of positive squares in 4 ways, for example, as 92236816 + 139405249 = 9604^2 + 11807^2 .

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

It is not a de Polignac number, because 231642065 - 2⁶ = 231642001 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436796 + ... + 437325.

It is an arithmetic number, because the mean of its divisors is an integer number (35401941).

Almost surely, 2^231642065 is an apocalyptic number.

It is an amenable number.

231642065 is a deficient number, since it is larger than the sum of its proper divisors (51573463).

231642065 is an equidigital number, since it uses as much as digits as its factorization.

231642065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874179.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 231642065 is about 15219.7918842539. The cubic root of 231642065 is about 614.1471996916.

Adding to 231642065 its reverse (560246132), we get a palindrome (791888197).

The spelling of 231642065 in words is "two hundred thirty-one million, six hundred forty-two thousand, sixty-five".