1222144340 has 12 divisors (see below), whose sum is σ = 2566503156. Its totient is φ = 488857728.

The previous prime is 1222144309. The next prime is 1222144393. The reversal of 1222144340 is 434412221.

It can be written as a sum of positive squares in 2 ways, for example, as 931714576 + 290429764 = 30524^2 + 17042^2 .

It is a congruent number.

It is an unprimeable number.

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, 30553589 + ... + 30553628.

It is an arithmetic number, because the mean of its divisors is an integer number (213875263).

Almost surely, 2^1222144340 is an apocalyptic number.

1222144340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222144340 is an abundant number, since it is smaller than the sum of its proper divisors (1344358816).

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

1222144340 is a wasteful number, since it uses less digits than its factorization.

1222144340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61107226 (or 61107224 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1222144340 is about 34959.1810544812. The cubic root of 1222144340 is about 1069.1553995252.

Adding to 1222144340 its reverse (434412221), we get a palindrome (1656556561).

The spelling of 1222144340 in words is "one billion, two hundred twenty-two million, one hundred forty-four thousand, three hundred forty".