1224420231 has 4 divisors (see below), whose sum is σ = 1632560312. Its totient is φ = 816280152.

The previous prime is 1224420229. The next prime is 1224420251. The reversal of 1224420231 is 1320244221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1320244221 = 3 ⋅440081407.

It is not a de Polignac number, because 1224420231 - 2¹ = 1224420229 is a prime.

It is a super-2 number, since 2×1224420231² = 2998409804164186722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1224420198 and 1224420207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1224420251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204070036 + ... + 204070041.

It is an arithmetic number, because the mean of its divisors is an integer number (408140078).

Almost surely, 2^1224420231 is an apocalyptic number.

1224420231 is a deficient number, since it is larger than the sum of its proper divisors (408140081).

1224420231 is an equidigital number, since it uses as much as digits as its factorization.

1224420231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408140080.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1224420231 is about 34991.7166055054. The cubic root of 1224420231 is about 1069.8186524118.

Adding to 1224420231 its reverse (1320244221), we get a palindrome (2544664452).

The spelling of 1224420231 in words is "one billion, two hundred twenty-four million, four hundred twenty thousand, two hundred thirty-one".