144221525 has 12 divisors (see below), whose sum is σ = 204382752. Its totient is φ = 98894640.

The previous prime is 144221513. The next prime is 144221599. The reversal of 144221525 is 525122441.

It is not a de Polignac number, because 144221525 - 2¹⁰ = 144220501 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 144221494 and 144221503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 411887 + ... + 412236.

It is an arithmetic number, because the mean of its divisors is an integer number (17031896).

Almost surely, 2^144221525 is an apocalyptic number.

It is an amenable number.

144221525 is a deficient number, since it is larger than the sum of its proper divisors (60161227).

144221525 is an equidigital number, since it uses as much as digits as its factorization.

144221525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824140 (or 824135 counting only the distinct ones).

The product of its digits is 3200, while the sum is 26.

The square root of 144221525 is about 12009.2266611968. The cubic root of 144221525 is about 524.4169187893.

Adding to 144221525 its reverse (525122441), we get a palindrome (669343966).

The spelling of 144221525 in words is "one hundred forty-four million, two hundred twenty-one thousand, five hundred twenty-five".