100221465 has 16 divisors (see below), whose sum is σ = 167326848. Its totient is φ = 51127296.

The previous prime is 100221427. The next prime is 100221487. The reversal of 100221465 is 564122001.

It is not a de Polignac number, because 100221465 - 2¹³ = 100213273 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144904 + ... + 145593.

It is an arithmetic number, because the mean of its divisors is an integer number (10457928).

Almost surely, 2^100221465 is an apocalyptic number.

100221465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100221465 is a deficient number, since it is larger than the sum of its proper divisors (67105383).

100221465 is a wasteful number, since it uses less digits than its factorization.

100221465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290528.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 100221465 is about 10011.0671259362. The cubic root of 100221465 is about 464.5012805459.

Adding to 100221465 its reverse (564122001), we get a palindrome (664343466).

The spelling of 100221465 in words is "one hundred million, two hundred twenty-one thousand, four hundred sixty-five".