100022665 has 4 divisors (see below), whose sum is σ = 120027204. Its totient is φ = 80018128.

The previous prime is 100022639. The next prime is 100022677. The reversal of 100022665 is 566220001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 566220001 = 43 ⋅13167907.

It can be written as a sum of positive squares in 2 ways, for example, as 66243321 + 33779344 = 8139^2 + 5812^2 .

It is a cyclic number.

It is not a de Polignac number, because 100022665 - 2¹⁷ = 99891593 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10002262 + ... + 10002271.

It is an arithmetic number, because the mean of its divisors is an integer number (30006801).

Almost surely, 2^100022665 is an apocalyptic number.

It is an amenable number.

100022665 is a deficient number, since it is larger than the sum of its proper divisors (20004539).

100022665 is an equidigital number, since it uses as much as digits as its factorization.

100022665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20004538.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 100022665 is about 10001.1331857945. The cubic root of 100022665 is about 464.1939479159.

Adding to 100022665 its reverse (566220001), we get a palindrome (666242666).

The spelling of 100022665 in words is "one hundred million, twenty-two thousand, six hundred sixty-five".