145324221 has 8 divisors (see below), whose sum is σ = 221446464. Its totient is φ = 83042400.

The previous prime is 145324199. The next prime is 145324237. The reversal of 145324221 is 122423541.

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

It is not a de Polignac number, because 145324221 - 2¹⁰ = 145323197 is a prime.

It is a super-2 number, since 2×145324221² = 42238258418513682, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 145324191 and 145324200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145324241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3460080 + ... + 3460121.

It is an arithmetic number, because the mean of its divisors is an integer number (27680808).

Almost surely, 2^145324221 is an apocalyptic number.

It is an amenable number.

145324221 is a deficient number, since it is larger than the sum of its proper divisors (76122243).

145324221 is an equidigital number, since it uses as much as digits as its factorization.

145324221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6920211.

The product of its digits is 1920, while the sum is 24.

The square root of 145324221 is about 12055.0496058706. The cubic root of 145324221 is about 525.7500643851.

Adding to 145324221 its reverse (122423541), we get a palindrome (267747762).

It can be divided in two parts, 14 and 5324221, that added together give a palindrome (5324235).

The spelling of 145324221 in words is "one hundred forty-five million, three hundred twenty-four thousand, two hundred twenty-one".