144216247 has 16 divisors (see below), whose sum is σ = 171507712. Its totient is φ = 118661760.

The previous prime is 144216221. The next prime is 144216271. The reversal of 144216247 is 742612441.

It is a de Polignac number, because none of the positive numbers 2^k-144216247 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144216277) 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, 24943 + ... + 30175.

It is an arithmetic number, because the mean of its divisors is an integer number (10719232).

Almost surely, 2^144216247 is an apocalyptic number.

144216247 is a deficient number, since it is larger than the sum of its proper divisors (27291465).

144216247 is a wasteful number, since it uses less digits than its factorization.

144216247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398.

The product of its digits is 10752, while the sum is 31.

The square root of 144216247 is about 12009.0069114811. The cubic root of 144216247 is about 524.4105214404.

Adding to 144216247 its reverse (742612441), we get a palindrome (886828688).

It can be divided in two parts, 1442 and 16247, that added together give a square (17689 = 133²).

The spelling of 144216247 in words is "one hundred forty-four million, two hundred sixteen thousand, two hundred forty-seven".