144491217 has 16 divisors (see below), whose sum is σ = 214169088. Its totient is φ = 86048640.

The previous prime is 144491213. The next prime is 144491231. The reversal of 144491217 is 712194441.

It is not a de Polignac number, because 144491217 - 2² = 144491213 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144491213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58548 + ... + 60965.

It is an arithmetic number, because the mean of its divisors is an integer number (13385568).

Almost surely, 2^144491217 is an apocalyptic number.

It is an amenable number.

144491217 is a deficient number, since it is larger than the sum of its proper divisors (69677871).

144491217 is a wasteful number, since it uses less digits than its factorization.

144491217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119560.

The product of its digits is 8064, while the sum is 33.

The square root of 144491217 is about 12020.4499499811. The cubic root of 144491217 is about 524.7435990616.

The spelling of 144491217 in words is "one hundred forty-four million, four hundred ninety-one thousand, two hundred seventeen".