144224399 has 4 divisors (see below), whose sum is σ = 157335720. Its totient is φ = 131113080.

The previous prime is 144224393. The next prime is 144224407. The reversal of 144224399 is 993422441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144224399 - 2¹² = 144220303 is a prime.

It is a super-2 number, since 2×144224399² = 41601354533822402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144224393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6555644 + ... + 6555665.

It is an arithmetic number, because the mean of its divisors is an integer number (39333930).

Almost surely, 2^144224399 is an apocalyptic number.

144224399 is a deficient number, since it is larger than the sum of its proper divisors (13111321).

144224399 is a wasteful number, since it uses less digits than its factorization.

144224399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13111320.

The product of its digits is 62208, while the sum is 38.

The square root of 144224399 is about 12009.3463185970. The cubic root of 144224399 is about 524.4204022365.

The spelling of 144224399 in words is "one hundred forty-four million, two hundred twenty-four thousand, three hundred ninety-nine".