100143665 has 8 divisors (see below), whose sum is σ = 120298920. Its totient is φ = 80030592.

The previous prime is 100143649. The next prime is 100143697. The reversal of 100143665 is 566341001.

It can be written as a sum of positive squares in 4 ways, for example, as 9684544 + 90459121 = 3112^2 + 9511^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 100143665 - 2⁴ = 100143649 is a prime.

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, 5060 + ... + 15029.

It is an arithmetic number, because the mean of its divisors is an integer number (15037365).

Almost surely, 2^100143665 is an apocalyptic number.

It is an amenable number.

100143665 is a deficient number, since it is larger than the sum of its proper divisors (20155255).

100143665 is an equidigital number, since it uses as much as digits as its factorization.

100143665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21091.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 100143665 is about 10007.1806718976. The cubic root of 100143665 is about 464.3810549542.

Adding to 100143665 its reverse (566341001), we get a palindrome (666484666).

The spelling of 100143665 in words is "one hundred million, one hundred forty-three thousand, six hundred sixty-five".