140224321 has 4 divisors (see below), whose sum is σ = 140463792. Its totient is φ = 139984852.

The previous prime is 140224319. The next prime is 140224349. The reversal of 140224321 is 123422041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 140224321 - 2¹ = 140224319 is a prime.

It is a super-2 number, since 2×140224321² = 39325720399822082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140224391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 118855 + ... + 120028.

It is an arithmetic number, because the mean of its divisors is an integer number (35115948).

Almost surely, 2^140224321 is an apocalyptic number.

It is an amenable number.

140224321 is a deficient number, since it is larger than the sum of its proper divisors (239471).

140224321 is an equidigital number, since it uses as much as digits as its factorization.

140224321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239470.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 140224321 is about 11841.6350644664. The cubic root of 140224321 is about 519.5265920693.

Adding to 140224321 its reverse (123422041), we get a palindrome (263646362).

The spelling of 140224321 in words is "one hundred forty million, two hundred twenty-four thousand, three hundred twenty-one".