144771217 has 2 divisors, whose sum is σ = 144771218. Its totient is φ = 144771216.

The previous prime is 144771199. The next prime is 144771229. The reversal of 144771217 is 712177441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141705216 + 3066001 = 11904^2 + 1751^2 .

It is a cyclic number.

It is not a de Polignac number, because 144771217 - 2¹¹ = 144769169 is a prime.

It is a super-2 number, since 2×144771217² = 41917410543322178, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144771257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72385608 + 72385609.

It is an arithmetic number, because the mean of its divisors is an integer number (72385609).

Almost surely, 2^144771217 is an apocalyptic number.

It is an amenable number.

144771217 is a deficient number, since it is larger than the sum of its proper divisors (1).

144771217 is an equidigital number, since it uses as much as digits as its factorization.

144771217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10976, while the sum is 34.

The square root of 144771217 is about 12032.0911316363. The cubic root of 144771217 is about 525.0823356883.

The spelling of 144771217 in words is "one hundred forty-four million, seven hundred seventy-one thousand, two hundred seventeen".