145015217 has 2 divisors, whose sum is σ = 145015218. Its totient is φ = 145015216.

The previous prime is 145015187. The next prime is 145015223. The reversal of 145015217 is 712510541.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141110641 + 3904576 = 11879^2 + 1976^2 .

It is a cyclic number.

It is not a de Polignac number, because 145015217 - 2⁶ = 145015153 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (145015267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72507608 + 72507609.

It is an arithmetic number, because the mean of its divisors is an integer number (72507609).

Almost surely, 2^145015217 is an apocalyptic number.

It is an amenable number.

145015217 is a deficient number, since it is larger than the sum of its proper divisors (1).

145015217 is an equidigital number, since it uses as much as digits as its factorization.

145015217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1400, while the sum is 26.

The square root of 145015217 is about 12042.2264137492. The cubic root of 145015217 is about 525.3771645022.

Adding to 145015217 its reverse (712510541), we get a palindrome (857525758).

The spelling of 145015217 in words is "one hundred forty-five million, fifteen thousand, two hundred seventeen".