144316821 has 12 divisors (see below), whose sum is σ = 211506176. Its totient is φ = 87464520.

The previous prime is 144316819. The next prime is 144316829. The reversal of 144316821 is 128613441.

It is not a de Polignac number, because 144316821 - 2¹ = 144316819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144316829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198421 + ... + 199146.

Almost surely, 2^144316821 is an apocalyptic number.

144316821 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

144316821 is a deficient number, since it is larger than the sum of its proper divisors (67189355).

144316821 is a wasteful number, since it uses less digits than its factorization.

144316821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 397592 (or 397581 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 144316821 is about 12013.1936220141. The cubic root of 144316821 is about 524.5323981571.

The spelling of 144316821 in words is "one hundred forty-four million, three hundred sixteen thousand, eight hundred twenty-one".