1222431340 has 48 divisors (see below), whose sum is σ = 2767137408. Its totient is φ = 450941184.

The previous prime is 1222431337. The next prime is 1222431341. The reversal of 1222431340 is 431342221.

It is not an unprimeable number, because it can be changed into a prime (1222431341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 511789 + ... + 514171.

It is an arithmetic number, because the mean of its divisors is an integer number (57648696).

Almost surely, 2^1222431340 is an apocalyptic number.

1222431340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222431340 is an abundant number, since it is smaller than the sum of its proper divisors (1544706068).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222431340 is a wasteful number, since it uses less digits than its factorization.

1222431340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4378 (or 4376 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1222431340 is about 34963.2856007555. The cubic root of 1222431340 is about 1069.2390840168.

Adding to 1222431340 its reverse (431342221), we get a palindrome (1653773561).

The spelling of 1222431340 in words is "one billion, two hundred twenty-two million, four hundred thirty-one thousand, three hundred forty".