1223420231 has 12 divisors (see below), whose sum is σ = 1348406136. Its totient is φ = 1109177520.

The previous prime is 1223420183. The next prime is 1223420243. The reversal of 1223420231 is 1320243221.

It is not a de Polignac number, because 1223420231 - 2⁶ = 1223420167 is a prime.

It is a super-2 number, since 2×1223420231² = 2993514123240186722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223420831) 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 11 ways as a sum of consecutive naturals, for example, 31580 + ... + 58686.

It is an arithmetic number, because the mean of its divisors is an integer number (112367178).

Almost surely, 2^1223420231 is an apocalyptic number.

1223420231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1223420231 is a deficient number, since it is larger than the sum of its proper divisors (124985905).

1223420231 is a wasteful number, since it uses less digits than its factorization.

1223420231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27502 (or 27491 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 1223420231 is about 34977.4245907271. The cubic root of 1223420231 is about 1069.5273281310.

Adding to 1223420231 its reverse (1320243221), we get a palindrome (2543663452).

The spelling of 1223420231 in words is "one billion, two hundred twenty-three million, four hundred twenty thousand, two hundred thirty-one".