101231665 has 8 divisors (see below), whose sum is σ = 124441128. Its totient is φ = 79009920.

The previous prime is 101231659. The next prime is 101231687. The reversal of 101231665 is 566132101.

It can be written as a sum of positive squares in 4 ways, for example, as 269361 + 100962304 = 519^2 + 10048^2 .

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

It is not a de Polignac number, because 101231665 - 2⁵ = 101231633 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, 246702 + ... + 247111.

It is an arithmetic number, because the mean of its divisors is an integer number (15555141).

Almost surely, 2^101231665 is an apocalyptic number.

It is an amenable number.

101231665 is a deficient number, since it is larger than the sum of its proper divisors (23209463).

101231665 is an equidigital number, since it uses as much as digits as its factorization.

101231665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493859.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 101231665 is about 10061.3947840247. The cubic root of 101231665 is about 466.0567403142.

Adding to 101231665 its reverse (566132101), we get a palindrome (667363766).

The spelling of 101231665 in words is "one hundred one million, two hundred thirty-one thousand, six hundred sixty-five".