1222413140 has 24 divisors (see below), whose sum is σ = 2764534920. Its totient is φ = 451352448.

The previous prime is 1222413139. The next prime is 1222413149. The reversal of 1222413140 is 413142221.

It can be written as a sum of positive squares in 4 ways, for example, as 36024004 + 1186389136 = 6002^2 + 34444^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222413149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2350535 + ... + 2351054.

It is an arithmetic number, because the mean of its divisors is an integer number (115188955).

Almost surely, 2^1222413140 is an apocalyptic number.

1222413140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222413140 is an abundant number, since it is smaller than the sum of its proper divisors (1542121780).

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

1222413140 is a wasteful number, since it uses less digits than its factorization.

1222413140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4701611 (or 4701609 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1222413140 is about 34963.0253267648. The cubic root of 1222413140 is about 1069.2337775844.

Adding to 1222413140 its reverse (413142221), we get a palindrome (1635555361).

The spelling of 1222413140 in words is "one billion, two hundred twenty-two million, four hundred thirteen thousand, one hundred forty".