144221565 has 8 divisors (see below), whose sum is σ = 230754528. Its totient is φ = 76918160.

The previous prime is 144221513. The next prime is 144221599. The reversal of 144221565 is 565122441.

144221565 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 144221565 - 2⁸ = 144221309 is a prime.

It is a super-2 number, since 2×144221565² = 41599719622098450, which contains 22 as substring.

It is a congruent 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, 4807371 + ... + 4807400.

It is an arithmetic number, because the mean of its divisors is an integer number (28844316).

Almost surely, 2^144221565 is an apocalyptic number.

144221565 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144221565 is a deficient number, since it is larger than the sum of its proper divisors (86532963).

144221565 is an equidigital number, since it uses as much as digits as its factorization.

144221565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9614779.

The product of its digits is 9600, while the sum is 30.

The square root of 144221565 is about 12009.2283265829. The cubic root of 144221565 is about 524.4169672718.

The spelling of 144221565 in words is "one hundred forty-four million, two hundred twenty-one thousand, five hundred sixty-five".