145524217 has 4 divisors (see below), whose sum is σ = 145564020. Its totient is φ = 145484416.

The previous prime is 145524209. The next prime is 145524221. The reversal of 145524217 is 712425541.

145524217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6661561 + 138862656 = 2581^2 + 11784^2 .

It is a cyclic number.

It is not a de Polignac number, because 145524217 - 2³ = 145524209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145524257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13792 + ... + 21937.

It is an arithmetic number, because the mean of its divisors is an integer number (36391005).

Almost surely, 2^145524217 is an apocalyptic number.

It is an amenable number.

145524217 is a deficient number, since it is larger than the sum of its proper divisors (39803).

145524217 is an equidigital number, since it uses as much as digits as its factorization.

145524217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39802.

The product of its digits is 11200, while the sum is 31.

The square root of 145524217 is about 12063.3418669952. The cubic root of 145524217 is about 525.9911338846.

Adding to 145524217 its reverse (712425541), we get a palindrome (857949758).

It can be divided in two parts, 14552 and 4217, that added together give a square (18769 = 137²).

The spelling of 145524217 in words is "one hundred forty-five million, five hundred twenty-four thousand, two hundred seventeen".